2024/10/03 更新

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写真a

ヤマウチ　ミホ
山内 美穂
YAMAUCHI MIHO
所属
先導物質化学研究所 分子集積化学部門 教授
理学府 化学専攻（併任）
職名
教授
連絡先
メールアドレス
電話番号
0928026454
プロフィール
合金は、金属組成により多様な構造を示すことが知られている。高効率および高選択性の合金触媒を得る為には、その反応に適した構造および組成をもつ合金粒子を得ることが重要である。我々は、相分離型、不規則固溶体型および規則型などの合金構造を制御し、効率的に物質やエネルギーの変換を行うための新規触媒の創製を行っている。具体的には、カーボンニュートラル実現に向けて、電気化学的CO2変換やアンモニア合成などの水素化反応に注目している。
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外部リンク

研究分野

  • ナノテク・材料 / エネルギー化学

学位

  • 博士（理学）

研究テーマ・研究キーワード

  • 研究テーマ：カーボンニュートラル・エネルギーサイクルを実現する為の高選択ナノ合金触媒の創製

    研究キーワード：カーボンニュートラル、触媒、ナノ合金、水素、エチレングリコール、アンモニア

    研究期間： 2012年1月

論文

  • Gas diffusion enhanced electrode with ultrathin superhydrophobic macropore structure for acidic CO<sub>2</sub> electroreduction 査読

    Sun, MX; Cheng, JM; Yamauchi, M

    NATURE COMMUNICATIONS   15 ( 1 )   491-1 - 491-9   2024年1月   （ eISSN:2041-1723 ）

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    担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Nature Communications  

    AbstractCarbon dioxide (CO2) electroreduction reaction (CO2RR) offers a promising strategy for the conversion of CO2 into valuable chemicals and fuels. CO2RR in acidic electrolytes would have various advantages due to the suppression of carbonate formation. However, its reaction rate is severely limited by the slow CO2 diffusion due to the absence of hydroxide that facilitates the CO2 diffusion in an acidic environment. Here, we design an optimal architecture of a gas diffusion electrode (GDE) employing a copper-based ultrathin superhydrophobic macroporous layer, in which the CO2 diffusion is highly enhanced. This GDE retains its applicability even under mechanical deformation conditions. The CO2RR in acidic electrolytes exhibits a Faradaic efficiency of 87% with a partial current density $$( {j}_{ { { { m{C } } } }_{2+ } })$$ of −1.6 A cm−2 for multicarbon products (C2+), and $$ {j}_{ { { { { { m{C } } } } } }_{2+ } }$$ of −0.34 A cm−2 when applying dilute 25% CO2. In a highly acidic environment, C2+ formation occurs via a second order reaction which is controlled by both the catalyst and its hydroxide.

    添付ファイル： s41467-024-44722-4.pdf

    DOI： 10.1038/s41467-024-44722-4

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    その他リンク： https://www.nature.com/articles/s41467-024-44722-4

  • Modulating Electronic States of Cu in Metal-Organic Frameworks for Emerging Controllable CH<sub>4</sub>/C<sub>2</sub>H<sub>4</sub> Selectivity in CO<sub>2</sub> Electroreduction

    Sun, MX; Cheng, JM; Anzai, A; Kobayashi, H; Yamauchi, M

    ADVANCED SCIENCE   11 ( 34 )   e2404931   2024年7月   （ eISSN:2198-3844 ）

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    担当区分：最終著者,　責任著者   記述言語：英語   出版者・発行元：Advanced Science  

    The intensive study of electrochemical CO2 reduction reaction (CO2RR) has resulted in numerous highly selective catalysts, however, most of these still exhibit uncontrollable selectivity. Here, it is reported for the first time the controllable CH4/C2H4 selectivity by modulating the electronic states of Cu incorporated in metal-organic frameworks with different functional ligands, achieving a Faradaic efficiency of 58% for CH4 on Cu-incorporated UiO-66-H (Ce) composite catalysts, Cu/UiO-66-H (Ce) and that of 44% for C2H4 on Cu/UiO-66-F (Ce). In situ measurements of Raman and X-ray absorption spectra revealed that the electron-withdrawing ability of the ligand side group controls the product selectivity on MOFs through the modulation of the electronic states of Cu. This work opens new prospects for the development of MOFs as a platform for the tailored tuning of selectivity in CO2RR.

    DOI： 10.1002/advs.202404931

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  • Defect-Driven Optimization of TiO<sub>2</sub>-Based Electrodes for High-Efficiency Electrochemical 1,4-NADH Generation 査読

    Besisa, NHA; Yoon, KS; Noguchi, TG; Kobayashi, H; Yamauchi, M

    ACS SUSTAINABLE CHEMISTRY & ENGINEERING   12 ( 26 )   9874 - 9881   2024年6月   （ ISSN:2168-0485 eISSN:2168-0485 ）

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    担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ACS Sustainable Chemistry and Engineering  

    The electrochemical reduction of nicotinamide adenine dinucleotide (NAD) using water as a hydrogen source is a promising strategy for the efficient and environmentally friendly production of the active enzymatic cofactor 1,4-NADH, which is a key for the further application of enzymatic systems in various industrial fields. However, the efficient regeneration of 1,4-NADH (NADH-reg) remains a major challenge. The rate-limiting step in the electrochemical conversion of the oxidized NAD is the second electron transfer to an NAD radical, which is formed by the reduction of NAD+, at a large overpotential, whereas the other side reactions proceed readily. To surmount this obstacle and promote NADH-reg, we used Ni nanoparticle-loaded TiO2 on a Ti electrode (Ni-TOT) containing a sufficient number of defects as active sites, which are formed at 300 °C in the H2 atmosphere. Ni-TOT facilitated the formation of enzymatically active 1,4-NADH with a superior yield and significantly reduced overpotential compared to those on untreated TOT. We found that hydrogen spillover promotes the formation of active sites on Ni-TOT. This study highlights the potential of engineered defect-enriched electrodes as a means to advance NADH-reg.

    添付ファイル： besisa-et-al-2024-defect-driven-optimization-of-tio2-based-electrodes-for-high-efficiency-electrochemical-1-4-nadh.pdf

    DOI： 10.1021/acssuschemeng.4c02313

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  • A membrane electrode assembly-type cell designed for selective CO production from bicarbonate electrolyte and air containing CO<sub>2</sub> mixed gas 招待 査読

    Yoshizawa, A; Higashi, M; Anzai, A; Yamauchi, M

    ENERGY ADVANCES   3 ( 4 )   778 - 783   2024年4月   （ eISSN:2753-1457 ）

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    担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Energy Advances  

    The electrochemical CO2 reduction reaction (CO2RR) combined with direct air capture (DAC) based CO2 is a promising method for terrestrial carbon cycling. In this study, we have designed an all-Ag cathode and constructed a membrane electrode assembly (MEA) cell to utilize CO2 capture solution, which can be produced by flowing air containing CO2 mixed gas into an alkaline solution. A MEA consisting of a Ag nanoparticle catalyst sprayed on a Nafion membrane and a Ag electrode were used to construct a MEA cell (Ag MEA-cell). The Ag MEA-cell exhibited selective CO production without severe side reactions, such as the hydrogen evolution reaction, even when an aqueous electrolyte was used. The operation of the Ag MEA-cell using CO2 capture solution, which was prepared by bubbling 60% air containing CO2 mixed gas (40% CO2 and 60% air, air-CO2) into 1 M KOH, achieved CO production with 86% faradaic efficiency (FECO). Furthermore, the Ag MEA-cell significantly suppressed O2 reduction and achieved FECO of 74% even when air-CO2 was used as a CO2 source.

    添付ファイル： D4YA00038B.pdf

    DOI： 10.1039/d4ya00038b

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  • Unraveling the Enhanced N<sub>2</sub> Activity on CuNi Alloy Catalysts for Ammonia Production: Experiments, DFT, and Statistical Analysis 査読

    Agharezaei, P; Tomohiro, NG; Kobayashi, H; Schlenz, H; Yamauchi, M; Ghuman, KK

    JOURNAL OF PHYSICAL CHEMISTRY C   128 ( 9 )   3703 - 3717   2024年2月   （ ISSN:1932-7447 eISSN:1932-7455 ）

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    担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Journal of Physical Chemistry C  

    One of the main challenges in designing catalysts for ammonia synthesis is to create active sites on the surface of the catalyst that prefers to reduce the strong N2 molecule despite its highly stable structure. Binary alloys have been demonstrated as potential ammonia synthesis catalysts in the literature. However, for binary alloys to be commercially viable, one needs to improve their catalytic activity for N2 reduction by strategically manipulating the several unique active sites present on their surface. Herein, by using computational tools, we created five different compositions of CuxNi1-x (0.5 ≤ x ≤ 0.9) alloys via special quasi-random structure (SQS) and genetic algorithm (GA). The alloy with about 50% of Cu and 50% of Ni is predicted to have the highest catalytic activity based on the shift of the d-band center toward the Fermi level. We then synthesized MgO-supported Cu0.5Ni0.5 nanoparticles and compared their activity for ammonia synthesis with that of Ni/MgO and Cu/MgO. It was found that the MgO-supported Cu0.5Ni0.5 alloy possesses 21 times higher activity than Cu/MgO and 3 times higher than Ni/MgO for ammonia synthesis, confirming the computational results. To demonstrate the impact of alloying on the catalytic activity, we further investigated all the possible unique sites on the surface of the Cu0.5Ni0.5 alloy for nitrogen reduction reaction (NRR) via density functional theory (DFT). The investigation of the 96 unique active sites on the Cu0.5Ni0.5 surface demonstrated that the position and concentration of Ni atoms near each investigated adsorption site have a linear correlation with the adsorption energy of the N2. Along with the structural and electronic properties of the active sites modified by Ni, orientation of the N2 molecule also plays an important role in determining the activity of the CuNi catalyst. These findings not only explained the notable increase in the activity of CuNi catalysts compared to the pure metals for NH3 synthesis but also offered critical insights required to tailor the specific surface environment of CuNi catalysts for NRR. This knowledge can serve as a foundation for further developments in designing binary alloy catalysts for sustainable ammonia synthesis.

    DOI： 10.1021/acs.jpcc.3c06417

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  • <i>In situ</i> electrochemical regeneration of active 1,4-NADH for enzymatic lactic acid formation <i>via</i> concerted functions on Pt-modified TiO<sub>2</sub>/Ti 査読

    Besisa, NHA; Yoon, KS; Yamauchi, M

    CHEMICAL SCIENCE   15 ( 9 )   3240 - 3248   2024年1月   （ ISSN:2041-6520 eISSN:2041-6539 ）

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    担当区分：最終著者,　責任著者   記述言語：その他   掲載種別：研究論文（学術雑誌）   出版者・発行元：Chemical Science  

    Nicotinamide adenine dinucleotide (NAD+) and its reduced form (NADH) are key cofactors serving as essential hydrogen accepters and donors to facilitate energy and material conversions under mild conditions. We demonstrate direct electrochemical conversion...

    添付ファイル： D3SC04104B.pdf

    DOI： 10.1039/d3sc04104b

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  • Carbon-Neutral Energy Cycle via Highly Selective Electrochemical Reactions Using Biomass Derivable Organic Liquid Energy Carriers 招待 査読

    Fukushima, T; Higashi, M; Yamauchi, M

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   96 ( 11 )   1209 - 1215   2023年11月   （ ISSN:0009-2673 eISSN:1348-0634 ）

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    担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Bulletin of the Chemical Society of Japan  

    Efficient storage and transport of electric energy is essential to promote the use of renewable energy-based electricity. An energy cycle based on highly selective redox reactions between lactic acid (Lac) and pyruvic acid (Pyr), both of which are liquid under ambient conditions and can be obtained from biomass resources, realizing a completely low emission system. As an energy storage device, an electrosynthesis cell (LAEC) to produce Lac from Pyr was built using a membrane electrode assembly consisting of a TiO2 cathode catalyst for the electroreduction of Pyr and an IrOx anode catalyst for water oxidation. LAEC achieved highly efficient Lac production from 10M Pyr aqueous solution with Faradaic efficiency (FE) of approximately 100% in the applied voltage range of 1.4-2.4 V, resulting in an energy conversion efficiency of 50% and a current density of -0.4A/sq cm at 2.0 V. Direct Lac fuel cell was also constructed and its FE values for the Pyr production reached approximately 100%, enabling direct electronic energy storage in bio-derivative liquid carriers and efficient energy circulation with minimal CO2 emissions.

    添付ファイル： bcsj.20230172.pdf

    DOI： 10.1246/bcsj.20230172

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  • Carbon-neutral energy cycle via highly selective electrochemical reactions using biomass derivable organic liquid energy carriers 招待 査読 国際誌

    T. Fukushima, M. Higashi, M. Yamauchi

    Bull. Chem. Soc. Jpn.   2023年10月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： doi:10.1246/bcsj.20230172

  • Definitive adsorption states of intermediates on Ru nanocatalysts for progress of ammonia synthesis discovered by modulation excitation spectroscopy under reaction conditions 査読

    Noguchi, TG; Rocabado, DSR; Kojo, Y; Oyabe, A; Ishimoto, T; Yamauchi, M

    JOURNAL OF CATALYSIS   426   301 - 307   2023年10月   （ ISSN:0021-9517 eISSN:1090-2694 ）

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    担当区分：最終著者,　責任著者   記述言語：その他   掲載種別：研究論文（学術雑誌）   出版者・発行元：Journal of Catalysis  

    Diffuse reflectance infrared Fourier transform spectroscopy combined with modulation excitation spectroscopy realized observation of NH3 production process on a Ru nanoparticle supported on MgO under operation conditions in the presence of both H2 and N2 (∼400 °C, 0.1 MPa). Our study clearly indicated that N2 dissociation is developed via transition from vertically adsorbed states of N2 (N2-Ver) on an on-top Ru site to horizontally adsorbed states via N2-Ver on a bridge site, which is a critical step for the progress of AS reactions on Ru catalysts at low temperatures and persists in the presence of both N2 and H2.

    添付ファイル： 1-s2.0-S0021951723003160-main.pdf

    DOI： 10.1016/j.jcat.2023.07.020

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  • Direct electrochemical CO<sub>2</sub> conversion using oxygen-mixed gas on a Cu network cathode and tailored anode 査読

    Anzai, A; Higashi, M; Yamauchi, M

    CHEMICAL COMMUNICATIONS   59 ( 75 )   11188 - 11191   2023年9月   （ ISSN:1359-7345 eISSN:1364-548X ）

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    担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Chemical Communications  

    Electrochemical CO2 reduction (eCO2R) by direct introduction of 60% air-containing CO2 mixed gas was demonstrated using a porous Cu network cathode formed on a hydrophobic gas diffusion layer (Cu/P-GDL). Cu/P-GDL exhibited eCO2R using the mixed gas with a remarkable faradaic efficiency of 85% for the production of C2+ chemicals, whereas a Cu cathode constructed on a conventional carbon gas diffusion layer (Cu/C-GDL) produced neither eCO2R products nor H2. Furthermore, the electrolyzer with Cu/P-GDL and optimized anode configuration achieved a partial current density of 132 mA cm−2 for C2+ chemicals even in the presence of 12% O2. Demonstration of eCO2R with impure CO2 gas would greatly expand its future applications.

    添付ファイル： authorreprints.pdf

    DOI： 10.1039/d3cc03298a

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  • Understanding the Roles of Hydroxide in CO2 Electroreduction on a Cu Electrode for Achieving Variable Selectivity

    Sun, MX; Staykov, A; Yamauchi, M

    ACS CATALYSIS   12 ( 24 )   14856 - 14863   2022年12月   （ ISSN:2155-5435 eISSN:2155-5435 ）

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    担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ACS Catalysis  

    Hydroxide-derived copper (OH/Cu) electrodes exhibit excellent performance for the electrocatalytic CO2reduction reaction (CO2RR). However, the role of hydroxide (OH) in CO2RR remains controversial; therefore, the origin of the selectivity enhancement emerging on OH/Cu has not been fully understood. In the present work, we quantitatively evaluated surface OH by electroadsorption and established a direct correlation between the OH amount and selectivity for the production of CH4and C2+on OH/Cu with the help of computational investigations concerning work functions of the surface. Based on these findings, we demonstrated variable selectivity using OH/Cu electrodes having a controlled OH amount; three OH/Cu electrodes realized their distinct selectivity such as Faradic efficiency (FE) for the production of CH4(CH4FE) of 78%, C2+FE of 71%, and the ratio of C2+-To-CH4>355. The proposed simple strategy for selectivity control would contribute to further quantity synthesis of value-Added chemicals using CO2RR.

    添付ファイル： acscatal.2c03650.pdf

    DOI： 10.1021/acscatal.2c03650

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  • Sustainable organic synthesis promoted on titanium dioxide using coordinated water and renewable energies/resources 招待 査読

    Yamauchi, M; Saito, H; Sugimoto, T; Mori, S; Saito, S

    COORDINATION CHEMISTRY REVIEWS   472   214773 - 214773   2022年12月   （ ISSN:0010-8545 eISSN:1873-3840 ）

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    記述言語：その他   掲載種別：研究論文（学術雑誌）   出版者・発行元：Coordination Chemistry Reviews  

    There is an increasing demand to replace conventional industrial systems that emit massive amounts of CO2 with lower-carbon emitting systems, and this has spurred research on the application of renewable energy for chemical conversions. Hydrogen and other simple chemical products have been efficiently manufactured using renewable light energy or secondary energy sources, such as electricity. More importantly, the direct use of water as a ubiquitous and clean hydrogen (or electron) and oxygen source in organic synthesis has recently been realized. Semiconductor photo- and electrocatalysts, such as metal oxides, play significant roles in energy transformations and in the activation of reactant chemicals. This paper reviews recent developments in organic synthesis using water and renewable light or electric energy to achieve sustainable chemical production. TiO2 is especially featured as a reaction platform where both reactants and water are efficiently activated through coordination with the TiO2 surface. We also discuss the role of water in the reaction on the TiO2 surface from the perspectives of synthetic chemistry, physical surface chemistry, and nanomaterial chemistry.

    添付ファイル： 1-s2.0-S001085452200368X-main.pdf

    DOI： 10.1016/j.ccr.2022.214773

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  • Understanding the Roles of Hydroxide in CO2 Electroreduction on a Cu Electrode for Achieving Variable Selectivity 査読 国際誌

    Mingxu Sun, Aleksandar Staykov, and Miho Yamauchi

    ACS Catal.   12   14856 - 14863   2022年11月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： doi.org/10.1021/acscatal.2c03650

  • Hydrogenomics: Efficient and Selective Hydrogenation of Stable Molecules Utilizing Three Aspects of Hydrogen 招待 査読 国際誌

    Fukutani, K; Yoshinobu, J; Yamauchi, M; Shima, T; Orimo, S

    CATALYSIS LETTERS   152 ( 6 )   1583 - 1597   2022年6月   （ ISSN:1011-372X eISSN:1572-879X ）

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    記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Catalysis Letters  

    Abstract: Hydrogen is chemically flexible revealing three aspects; protium (H), proton (H+), and hydride (H-), which are active toward hydrogenation reactions. While the reactivity of protium is characterized by the potential energy at a catalyst surface, electron transfer is of importance as an additional degree of freedom in the reactions with proton and hydride. A promising strategy is to make full use of these active hydrogen species for hydrogenation of stable molecules and achieve chemical transformation of these molecules, which we call “Hydrogenomics”. By reviewing recent studies on the hydrogenation of hydrocarbon, carbon dioxide, dinitrogen, and so on using these active hydrogen species on model metal surfaces, nanoscale electrocatalysts, and multimetallic polyhydride clusters, we discuss the fundamental concepts behind the reactions and possible control of the efficient and selective hydrogenation reactions. Graphic Abstract: [Figure not available: see fulltext.]

    添付ファイル： Fukutani2021_Article_HydrogenomicsEfficientAndSelec.pdf

    DOI： 10.1007/s10562-021-03750-1

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    その他リンク： https://link.springer.com/article/10.1007/s10562-021-03750-1/fulltext.html

  • Cu Modified TiO<sub>2</sub> Catalyst for Electrochemical Reduction of Carbon Dioxide to Methane

    Anzai, A; Liu, MH; Ura, K; Noguchi, TG; Yoshizawa, A; Kato, K; Sugiyama, T; Yamauchi, M

    CATALYSTS   12 ( 5 )   478 - 478   2022年4月   （ eISSN:2073-4344 ）

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    記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Catalysts  

    Electrochemical reduction of CO2 (ECO2R) is gaining attention as a promising approach to store excess or intermittent electricity generated from renewable energies in the form of valuable chemicals such as CO, HCOOH, CH4, and so on. Selective ECO2R to CH4 is a challenging target because the rate-determining step of CH4 formation, namely CO* protonation, competes with hydrogen evolution reaction and the C–C coupling toward the production of longer-chain chemicals. Herein, a Cu-TiO2 composite catalyst consisting of CuOx clusters or Cu nanoparticles (CuNPs), which are isolated on the TiO2 grain surface, was synthesized using a one-pot solvothermal method and subsequent thermal treatment. The Cu-TiO2 catalyst exhibited high selectivity for CH4, and the ratio of FE for CH4 to total FE for all products in ECO2R reached 70&#37;.

    添付ファイル： catalysts-12-00478.pdf

    DOI： 10.3390/catal12050478

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  • Heterointerface Created on Au‐Cluster‐Loaded Unilamellar Hydroxide Electrocatalysts as a Highly Active Site for the Oxygen Evolution Reaction 査読

    Kitano, S; Noguchi, TG; Nishihara, M; Kamitani, K; Sugiyama, T; Yoshioka, S; Miwa, T; Yoshizawa, K; Staykov, A; Yamauchi, M

    ADVANCED MATERIALS   34 ( 16 )   2110552 - 2110552   2022年3月   （ ISSN:0935-9648 eISSN:1521-4095 ）

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    記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Advanced Materials  

    AbstractThe oxygen evolution reaction (OER) is a critical element for all sorts of reactions that use water as a hydrogen source, such as hydrogen evolution and electrochemical CO2 reduction, and novel design principles that provide highly active sites on OER electrocatalysts push the limits of their practical applications. Herein, Au‐cluster loading on unilamellar exfoliated layered double hydroxide (ULDH) electrocatalysts for the OER is demonstrated to fabricate a heterointerface between Au clusters and ULDHs as an active site, which is accompanied by the oxidation state modulation of the active site and interfacial direct OO coupling (“interfacial DOOC”). The Au‐cluster‐loaded ULDHs exhibit excellent activities for the OER with an overpotential of 189 mV at 10 mA cm−2. X‐ray absorption fine structure measurements reveal that charge transfer from the Au clusters to ULDHs modifies the oxidation states of trivalent metal ions, which can be active sites on the ULDHs. The present study, supported by highly sensitive spectroscopy combining reflection absorption infrared spectroscopy and modulation‐excitation spectroscopy and density functional theory calculations, indicates that active sites at the interface between the Au clusters and ULDHs promote a novel OER mechanism through interfacial DOOC, thereby achieving outstanding catalytic performance.

    添付ファイル： Advanced Materials - 2022 - Kitano - Heterointerface Created on Au%E2%80%90Cluster%E2%80%90Loaded Unilamellar Hydroxide Electrocatalysts as.pdf

    DOI： 10.1002/adma.202110552

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    その他リンク： https://onlinelibrary.wiley.com/doi/full-xml/10.1002/adma.202110552

  • Uncovering the Mechanism of the Hydrogen Poisoning on Ru Nanoparticles via Density Functional Theory Calculations 招待 査読

    Rocabado, DSR; Aizawa, M; Noguchi, TG; Yamauchi, M; Ishimoto, T

    CATALYSTS   12 ( 3 )   331 - 331   2022年3月   （ eISSN:2073-4344 ）

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    記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Catalysts  

    Although hydrogen plays a crucial role in ammonia synthesis, very little is known about its poisoning of Ru catalysts. In this study, density functional theory calculations of H2 and N2 dissociations, and H atom binding on Ru153 were performed to provide a fundamental understanding of hydrogen poisoning. Because of the kinetic dominance of the H2 dissociation over N2 (vertically or horizontally adsorbed) splitting, the dissociated H atoms block the active sites required for horizontal (less energetically demanding dissociation) N2 adsorption to occur either from the gas phase or after its geometrical transformation from being adsorbed vertically. Additionally, the dissociated H atoms withdraw electrons from the surface, which reduces the ability of the neighboring Ru atoms to donate electrons for N2 activation, hindering its dissociation and suppressing ammonia synthesis.

    添付ファイル： catalysts-12-00331.pdf

    DOI： 10.3390/catal12030331

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  • Inter-element miscibility driven stabilization of ordered pseudo-binary alloy

    松本 憲志, 佐藤 良太, 立津 慶幸, 髙畑 遼, 山添 誠司, 山内 美穂, 稲垣 祐次, 堀部 陽一, 工藤 昌輝, 鳥山 誉亮, 阿内 三成, 治田 充貴, 倉田 博基, 寺西 利治

    NATURE COMMUNICATIONS   13 ( 1 )   1047   2022年2月   （ eISSN:20411723 ）

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    記述言語：その他   掲載種別：研究論文（学術雑誌）   出版者・発行元：Springer Nature  

    Abstract

    An infinite number of crystal structures in a multicomponent alloy with a specific atomic ratio can be devised, although only thermodynamically-stable phases can be formed. Here, we experimentally show the first example of a layer-structured pseudo-binary alloy, theoretically called Z3-FePd3. This Z3 structure is achieved by adding a small amount of In, which is immiscible with Fe but miscible with Pd and consists of an alternate L10 (CuAu-type)-PdFePd trilayer and Pd–In ordered alloy monolayer along the c axis. First-principles calculations strongly support that the specific inter-element miscibility of In atoms stabilizes the thermodynamically-unstable Z3-FePd3 phase without significantly changing the original density of states of the Z3-FePd3 phase. Our results demonstrate that the specific inter-element miscibility can switch stable structures and manipulate the material nature with a slight composition change.

    DOI： 10.1038/s41467-022-28710-0

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    その他リンク： https://www.nature.com/articles/s41467-022-28710-0

  • Achieving a Carbon Neutral Future through Advanced Functional Materials and Technoligies 招待 査読 国際誌

    A. Chapman, E. Ertekin, M. Kubota, A. Nagao, K. Bertsch, A. Macadre, T. Tsuchiyama, T. Masamura, S. Takaki, R. Komoda, M. Dadfarnia, B. Somerday, A, Staykov, J. Sugimura, Y. Sawae, T. Morita, H. Tanaka, K. Yagi, V. Niste, P. Saravanan, S. Onitsuka, K-S. Yoon, S. Ogo, T. Matsushima, G. Tumen-Ulziil, D. Klotz, D. H. Nguyen,G. Harrington, C. Adachi, H. Matsumoto, L. Kawati, Y. Takahashi, N. Kosem, T. Ishihara, M. Yamauchi,B. B. Saha,M. A. Islam, J. Miyawaki, H. Sivasavkaran,M. Kohno, S. Fujikawa, R. Selyanchyn, T. Tsuji, Y. Higashi, R. Kirchheim,P. Sofronis

    Bull. Chem. Soc. Jpn.   95 ( 1 )   73 - 103   2022年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： doi.org/10.1246/bcsj.20210323

  • Adsorption States of N2/H2 Activated on Ru Nanoparticles Uncovered by Modulation–Excitation Infrared Spectroscopy and Density Functional Theory Calculations 査読

    15 ( 12 )   20079 - 20086   2021年12月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/acsnano.1c07825

  • Inversely polarized thermo-electrochemical power generation via the reaction of an organic redox couple on a TiO<inf>2</inf>/Ti mesh electrode

    Hiroto Eguchi, Takashi Kobayashi, Teppei Yamada, David S.Rivera Rocabado, Takayoshi Ishimoto, Miho Yamauchi

    Scientific Reports   11 ( 1 )   2021年12月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1038/s41598-021-93269-7

  • Inorganic Nanocatalysts for Hydrogenation Reactions Contributable to a Sustainable Material Supply 招待 査読 国際誌

    Miho Yamauchi

    Chemistry Letters   50 ( 11 )   1901 - 1908   2021年11月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1246/cl.210454

  • Selectivity enhancement in the electrochemical reduction of oxalic acid over titanium dioxide nanoparticles achieved by shape and energy-state control

    Hiroto Eguchi, Kenichi Kato, Gergely Juhasz, Miho Yamauchi

    Catalysis Science and Technology   11 ( 23 )   7592 - 7597   2021年9月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1039/d1cy01239h

  • Proton-Coupled Electron Transfer in Electrochemical Alanine Formation from Pyruvic Acid: Mechanism of Catalytic Reaction at the Interface between TiO2 (101) and Water

    Miho Isegawa, Aleksandar Staykov, Miho Yamauchi

    The Journal of Physical Chemistry C   125 ( 23 )   12603 - 12613   2021年6月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/acs.jpcc.1c01304

  • Support Effect of Metal-Organic Frameworks on Ethanol Production through Acetic Acid Hydrogenation

    Shotaro Yoshimaru, Masaaki Sadakiyo, Nobutaka Maeda, Miho Yamauchi, Kenichi Kato, Jenny Pirillo, Yuh Hijikata

    ACS Applied Materials and Interfaces   13 ( 17 )   19992 - 20001   2021年5月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/acsami.1c01100

  • Catalytic Roles and Synergetic Effects of Iron-Group Elements on Monometals and Alloys for Electrochemical Oxidation of Ammonia

    Sho Kitano, Mei Lee Ooi, Tomokazu Yamamoto, Syo Matsumura, Miho Yamauchi

    Bulletin of the Chemical Society of Japan   94 ( 4 )   1292 - 1299   2021年4月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1246/bcsj.20210007

  • Electrosynthesis of glycine from bio-derivable oxalic acid 招待 査読 国際誌

    Takashi Fukushima, Miho Yamauchi

    Journal of Applied Electrochemistry   51 ( 1 )   99 - 106   2021年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1007/s10800-020-01428-x

  • Multiscale design for high-performance glycolic acid electro-synthesis cell: Preparation of nanoscale-IrO<inf>2</inf>-applied Ti anode and optimization of cell assembling 招待

    Takashi Fukushima, Manabu Higashi, Sho Kitano, Takeharu Sugiyama, Miho Yamauchi

    Catalysis Today   351   12 - 20   2020年7月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1016/j.cattod.2019.03.071

  • Impact of Ir-Valence Control and Surface Nanostructure on Oxygen Evolution Reaction over a Highly Efficient Ir-TiO2 Nanorod Catalyst 査読 国際誌

    Junfang Cheng, Jun Yang, Sho Kitano, Gergely Juhasz, Manabu Higashi, Masaaki Sadakiyo, Kenichi Kato, Satoru Yoshioka, Takeharu Sugiyama, Miho Yamauchi, Naotoshi Nakashima

    ACS Catalysis   9 ( 8 )   6974 - 6986   2019年8月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/acscatal.9b01438

  • Impact of Ir-Valence Control and Surface Nanostructure on Oxygen Evolution Reaction over a Highly Efficient Ir-TiO<inf>2</inf> Nanorod Catalyst

    Junfang Cheng, Jun Yang, Sho Kitano, Gergely Juhasz, Manabu Higashi, Masaaki Sadakiyo, Kenichi Kato, Satoru Yoshioka, Takeharu Sugiyama, Miho Yamauchi, Naotoshi Nakashima

    ACS Catalysis   9 ( 8 )   6974 - 6986   2019年8月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/acscatal.9b01438

  • Tailoring Widely Used Ammonia Synthesis Catalysts for H and N Poisoning Resistance 査読 国際誌

    K. Ghuman, K. Tozaki, M. Sadakiyo, S. Kitano, T. Oyabe, M. Yamauchi

    Phys. Chem. Chem. Phys.   2019年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

  • Electrosynthesis of amino acids from biomass-derivable acids on titanium dioxide 査読

    Takashi Fukushima, Miho Yamauchi

    Chemical Communications   55 ( 98 )   14721 - 14724   2019年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1039/c9cc07208j

  • Electrochemical hydrogenation of non-aromatic carboxylic acid derivatives as a sustainable synthesis process From catalyst design to device construction 査読 国際誌

    Physical Chemistry Chemical Physics   21 ( 11 )   5882 - 5889   2019年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1039/c8cp07445c

  • Catalytic enhancement on Ti-Zr complex oxide particles for electrochemical hydrogenation of oxalic acid to produce an alcoholic compound by controlling electronic states and oxide structures 査読

    M. Yamauchi, S. Hata, H. Eguchi, S. Kitano, T. Fukushima, M. Higashi, M. Sadakiyo, K. Kato

    Catalysis Science and Technology   9 ( 23 )   6561 - 6565   2019年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1039/c9cy01541h

  • Carbon-neutral energy cycles using alcohols 査読

    Takashi Fukushima, Sho Kitano, Shinichi Hata, Miho Yamauchi

    Science and Technology of Advanced Materials   19 ( 1 )   142 - 152   2018年12月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1080/14686996.2018.1426340

  • Palladium Single Atoms Supported by Interwoven Carbon Nanotube and Manganese Oxide Nanowire Networks for Enhanced Electrocatalysis 査読 国際誌

    W. Xiang, Y. Zhao, Z. Jiang, X. Li, H. Zhang, Y. Sun, Z. Ning, F. Du, P. Gao, J. Qian, K. Kato, M. Yamauchi, Y. Sun

    J. Mater. Chem. A   2018年10月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

  • Electrochemical Production of Glycolic Acid from Oxalic Acid Using a Polymer Electrolyte Alcohol Electrosynthesis Cell Containing a Porous TiO<inf>2</inf> Catalyst 査読

    Masaaki Sadakiyo, Shinichi Hata, Xuedong Cui, Miho Yamauchi

    Scientific Reports   7 ( 1 )   2017年12月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1038/s41598-017-17036-3

  • Electroreduction of carbon dioxide to hydrocarbons using bimetallic Cu-Pd catalysts with different mixing patterns 査読

    Sichao Ma, Masaaki Sadakiyo, Minako Heim, Raymond Luo, Richard T. Haasch, Jake I. Gold, Miho Yamauchi, Paul J.A. Kenis

    Journal of the American Chemical Society   139 ( 1 )   47 - 50   2017年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/jacs.6b10740

  • Modulation of the catalytic activity of Pt nanoparticles through charge-transfer interactions with metal-organic frameworks 査読 国際誌

    Shotaro Yoshimaru, Masaaki Sadakiyo, Aleksandar Tsekov Staykov, Kenichi Kato, Miho Yamauchi

    Chemical Communications   53 ( 50 )   6720 - 6723   2017年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1039/c7cc02829f

  • Hydrogenation of oxalic acid using light-assisted water electrolysis for the production of an alcoholic compound 査読 国際誌

    Green Chem.   18   3700 - 3706   2016年10月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

  • Experimental and Quantum Chemical Approaches to Develop Highly Selective Nanocatalysts for CO<inf>2</inf>-free Power Circulation 招待 査読

    Miho Yamauchi, Nobuki Ozawa, Momoji Kubo

    Chemical Record   16 ( 5 )   2249 - 2259   2016年10月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1002/tcr.201600047

  • Experimental and Quantum Chemical Approaches to Develop Highly Selective Nanocatalysts for CO2-free Power Circulation 査読 国際誌

    Miho Yamauchi, Nobuki Ozawa, Momoji Kubo

    Chemical Record   16 ( 5 )   2249 - 2259   2016年10月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1002/tcr.201600047

  • One-step electrosynthesis of ethylene and ethanol from CO2 in an alkaline electrolyzer 査読 国際誌

    Miho Yamauchi, S. Ma, Masaaki Sadakiyo, R. Luoa, P. Kenis

    J. Power Sources   310   219 - 228   2016年10月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

  • Visible-Light-Driven Photocatalytic Hydrogen Generation on Nanosized TiO<inf>2</inf>-II Stabilized by High-Pressure Torsion

    Hadi Razavi-Khosroshahi, Kaveh Edalati, Masashige Hirayama, Hoda Emami, Makoto Arita, Miho Yamauchi, Hidehisa Hagiwara, Shintaro Ida, Tatsumi Ishihara, Etsuo Akiba, Zenji Horita, Masayoshi Fuji

    ACS Catalysis   6 ( 8 )   5103 - 5107   2016年8月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/acscatal.6b01482

  • A new approach for the facile preparation of metal-organic framework composites directly contactingwith metal particles through ark plasma deposition 査読 国際誌

    Miho Yamauchi, Masaaki Sadakiyo, Shotaro Yoshimaru, H. Kasai, K. Kato, M. Takata

    Chem. Comm.   52   8385 - 8388   2016年5月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

  • One-step electrosynthesis of ethylene and ethanol from CO<inf>2</inf> in an alkaline electrolyzer 査読 国際誌

    Sichao Ma, Masaaki Sadakiyo, Raymond Luo, Minako Heima, Miho Yamauchi, Paul J.A. Kenis

    Journal of Power Sources   301   219 - 228   2016年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1016/j.jpowsour.2015.09.124

  • One-step electrosynthesis of ethylene and ethanol from CO#D2</sub in an alkaline electrolyzer 査読 国際誌

    Sichao Ma, Masaaki Sadakiyo, Raymond Luo, Minako Heima, Miho Yamauchi, Paul J.A. Kenis

    Journal of Power Sources   301   219 - 228   2016年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1016/j.jpowsour.2015.09.124

  • Preparation of solid-solution type Fe-Co nanoalloys by synchronous deposition of Fe and Co using dual arc plasma guns 査読 国際誌

    Masaaki Sadakiyo, Minako Heima, Tomokazu Yamamoto, Syo Matsumura, Masashi Matsuura, Satoshi Sugimoto, Kenichi Kato, Masaki Takata, Miho Yamauchi

    Dalton Transactions   44 ( 36 )   15764 - 15768   2015年8月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1039/c5dt02815a

  • CO<inf>2</inf>-free electric power circulation via direct charge and discharge using the glycolic acid/oxalic acid redox couple 査読 国際誌

    R. Watanabe, M. Yamauchi, M. Sadakiyo, R. Abe, T. Takeguchi

    Energy and Environmental Science   8 ( 5 )   1456 - 1462   2015年5月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1039/c5ee00192g

  • Atomically mixed Fe-group nanoalloys: Catalyst design for the selective electrooxidation of ethylene glycol to oxalic acid 査読 国際誌

    Takeshi Matsumoto, Masaaki Sadakiyo, Mei Lee Ooi, Tomokazu Yamamoto, Syo Matsumura, Kenichi Kato, Tatsuya Takeguchi, Nobuki Ozawa, Momoji Kubo, Miho Yamauchi

    Physical Chemistry Chemical Physics   17 ( 17 )   11359 - 11366   2015年5月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1039/c5cp00954e

  • Hydrogen-Induced Structural Transformation of AuCu Nanoalloys Probed by Synchrotron X-ray Diffraction Techniques 査読 国際誌

    M. Yamauchi, K. Okubo, T. Tsukuda, K. Kato, M. Takata, S. Takeda

    Nanoscale   6 ( 8 )   4067 - 4071   2014年8月

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    記述言語：日本語   掲載種別：研究論文（学術雑誌）  

    DOI： DOI: 10.1039/c3nr06327e

  • Synthesis and catalytic application of PVP-coated Ru nanoparticles embedded in a porous metal-organic framework 査読 国際誌

    Masaaki Sadakiyo, Masaru Kon-No, Katsutoshi Sato, Katsutoshi Nagaoka, Hidetaka Kasai, Kenichi Kato, Miho Yamauchi

    Dalton Transactions   43 ( 29 )   11295 - 11298   2014年8月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1039/c4dt00996g

  • CO<inf>2</inf>-free power generation on an iron group nanoalloy catalyst via selective oxidation of ethylene glycol to oxalic acid in alkaline media 査読 国際誌

    Takeshi Matsumoto, Masaaki Sadakiyo, Mei Lee Ooi, Sho Kitano, Tomokazu Yamamoto, Syo Matsumura, Kenichi Kato, Tatsuya Takeguchi, Miho Yamauchi

    Scientific Reports   4   5620 - 5620   2014年7月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1038/srep05620

  • Hydrogen-induced structural transformation of AuCu nanoalloys probed by synchrotron X-ray diffraction techniques

    M. Yamauchi, K. Okubo, T. Tsukuda, K. Kato, M. Takata, S. Takeda

    Nanoscale   6 ( 8 )   4067 - 4071   2014年4月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1039/c3nr06327e

  • Development of Nanoalloy Catalysts for Realization of Carbon-Neutral Energy Cycles 招待 査読 国際誌

    Miho Yamauchi, Minako Heima, Masaaki Sadakiyo

    Mater. Sci. Forum.   783-786   2046 - 2050   2014年3月

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    記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

    DOI： 10.4028/www.scientific.net/MSF.783-786

  • Hydrogen-related Properties of Metal and Alloy Nanoparticles 招待 査読 国際誌

    Miho Yamauchi

    2   010305 - 010305   2014年3月

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    記述言語：英語  

    DOI： 10.7566/JPSCP.2.010305

  • Design and synthesis of hydroxide ion-conductive metal-organic frameworks based on salt inclusion 査読 国際誌

    Masaaki Sadakiyo, Hidetaka Kasai, Kenichi Kato, Masaki Takata, Miho Yamauchi

    Journal of the American Chemical Society   136 ( 5 )   1702 - 1705   2014年2月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/ja410368j

  • Enhanced magnetization in highly crystalline and atomically mixed bcc Fe-Co nanoalloys prepared by hydrogen reduction of oxide composites 招待 査読 国際誌

    Md Jafar Sharif, Miho Yamauchi, Shoichi Toh, Syo Matsumura, Shin Ichiro Noro, Kenichi Kato, Masaki Takata, Tatsuya Tsukuda

    Nanoscale   5 ( 4 )   1489 - 1493   2013年2月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1039/c2nr33467d

  • New useful function of hydrogen in materials 招待 査読 国際誌

    Atsunori Kamegawa, Asaya Fujita, Miho Yamauchi, Masuo Okada

    J. Alloys Compd.   580   S401 - S405   2013年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1016/j.jallcom.2013.03.225

  • Nanosize-induced drastic drop in equilibrium hydrogen pressure for hydride formation and structural stabilization in Pd-Rh solid-solution alloys 査読 国際誌

    Hirokazu Kobayashi, Hitoshi Morita, Miho Yamauchi, Ryuichi Ikeda, Hiroshi Kitagawa, Yoshiki Kubota, Kenichi Kato, Masaki Takata, Shoichi Toh, Syo Matsumura

    Journal of the American Chemical Society   134 ( 30 )   12390 - 12393   2012年8月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/ja305031y

  • Stabilized gold clusters: From isolation toward controlled synthesis 査読 国際誌

    Prasenjit Maity, Songhai Xie, Miho Yamauchi, Tatsuya Tsukuda

    Nanoscale   4 ( 14 )   4027 - 4037   2012年7月

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    記述言語：英語  

    DOI： 10.1039/c2nr30900a

  • Nanosize-Induced Drastic Drop in Equilibrium Hydrogen Pressure for Hydride Formation and Structural Stabilization in Pd-Rh Solid-Solution Alloys 査読 国際誌

    Kobayashi, Hirokazu, Morita, Hitoshi, Miho Yamauchi, Ikeda, Ryuichi, Kitagawa, Hiroshi, Kubota, Yoshiki, Kato, Kenichi, Takata, Masaki, Toh, Shoichi, Matsumura, Syo

    134   12390 - 12393   2012年6月

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    記述言語：英語  

  • Selective synthesis of organogold magic clusters Au<inf>54</inf>(C≡CPh)<inf>26</inf> 査読 国際誌

    48 ( 49 )   6085 - 6087   2012年5月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    Organogold clusters Au (C Ph) were selectively synthesized by reacting polymer-stabilized Au clusters (1.2 ± 0.2 nm) with excess phenylacetylene in chloroform. © 2012 The Royal Society of Chemistry. 54 2 26

    DOI： 10.1039/c2cc18153c

  • Finding hydrogen-storage capability in iridium induced by the nanosize effect 査読 国際誌

    Hirokazu Kobayashi, Miho Yamauchi, Hiroshi Kitagawa

    Journal of the American Chemical Society   134 ( 16 )   6893 - 6895   2012年4月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/ja302021d

  • Nanosize-induced hydrogen storage and capacity control in a non-hydride-forming element: Rhodium 査読 国際誌

    Hirokazu Kobayashi, Hitoshi Morita, Miho Yamauchi, Ryuichi Ikeda, Hiroshi Kitagawa, Yoshiki Kubota, Kenichi Kato, Masaki Takata

    Journal of the American Chemical Society   133 ( 29 )   11034 - 11037   2011年7月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/ja2027772

  • Production of an ordered (B2) CuPd nanoalloy by low-temperature annealing under hydrogen atmosphere 査読 国際誌

    Miho Yamauchi, Tatsuya Tsukuda

    Dalton Transactions   40 ( 18 )   4842 - 4845   2011年5月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1039/c0dt01632b

  • Highly selective ammonia synthesis from nitrate with photocatalytically generated hydrogen on CuPd/TiO<inf>2</inf> 査読 国際誌

    Miho Yamauchi, Ryu Abe, Tatsuya Tsukuda, Kenichi Kato, Masaki Takata

    Journal of the American Chemical Society   133 ( 5 )   1150 - 1152   2011年2月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/ja106285p

  • Hydrogen-storage properties of solid-solution alloys of immiscible neighboring elements with Pd 査読 国際誌

    Kohei Kusada, Miho Yamauchi, Hirokazu Kobayashi, Hiroshi Kitagawa, Yoshiki Kubota

    Journal of the American Chemical Society   132 ( 45 )   15896 - 15898   2010年11月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/ja107362z

  • Atomic-level Pd-Pt alloying and largely enhanced hydrogen-storage capacity in bimetallic nanoparticles reconstructed from core/shell structure by a process of hydrogen absorption/desorption 査読 国際誌

    Hirokazu Kobayashi, Miho Yamauchi, Hiroshi Kitagawa, Yoshiki Kubota, Kenichi Kato, Masaki Takata

    Journal of the American Chemical Society   132 ( 16 )   5576 - 5577   2010年4月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/ja1013163

  • Hydrogen storage mediated by Pd and Pt nanoparticles 招待 査読 国際誌

    Miho Yamauchi, Hirokazu Kobayashi, Hiroshi Kitagawa

    ChemPhysChem   10 ( 15 )   2566 - 2576   2009年10月

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    記述言語：英語  

    DOI： 10.1002/cphc.200900289

  • Hydrogen-induced new functions in sub-nano lattice matter

    Atsunori Kamegawa, Jun Nakahigashi, Akira Yamaguchi, Asaya Fujita, Miho Yamauchi, Hiroshi Kitagawa, Masuo Okada

    Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals   73 ( 3 )   141 - 150   2009年3月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.2320/jinstmet.73.141

  • On the Nature of Storng Hydrogen Trapping Inside Pd Nanoparticles 査読 国際誌

    Hirokazu Kobayashi, Miho Yamauchi, Hiroshi Kitagawa, Yoshiki Kubota, Kenichi Kato, Takata Masaki

    Journal of the American Chemical Society   2008年5月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

  • Nanosize effects on hydrogen storage in palladium 査読 国際誌

    Miho Yamauchi, Ryuichi Ikeda, Hiroshi Kitagawa, Masaki Takata

    Journal of Physical Chemistry C   112 ( 9 )   3294 - 3299   2008年3月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/jp710447j

  • Hydrogen absorption in the core/shell interface of Pd/Pt nanoparticles 査読 国際誌

    Hirokazu Kobayashi, Miho Yamauchi, Hiroshi Kitagawa, Yoshiki Kubota, Kenichi Kato, Masaki Takata

    Journal of the American Chemical Society   130 ( 6 )   1818 - 1819   2008年2月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/ja078126k

  • On the nature of strong hydrogen atom trapping inside Pd nanoparticles

    Hirokazu Kobayashi, Miho Yamauchi, Hiroshi Kitagawa, Yoshiki Kubota, Kenichi Kato, Masaki Takata

    Journal of the American Chemical Society   130 ( 6 )   1828 - 1829   2008年2月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/ja7102372

  • Hydrogen-induced crystal structural transformation of FePt nanoparticles at low temperature

    Masafumi Nakaya, Masayuki Kanehara, Miho Yamauchi, Hiroshi Kitagawa, Toshiharu Teranishi

    Journal of Physical Chemistry C   111 ( 20 )   7231 - 7234   2007年5月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/jp072201w

  • Hydrogen absorption of the polymer-coated Pd nanoparticle

    Miho Yamauchi, Hiroshi Kitagawa

    Synthetic Metals   153 ( 1-3 )   353 - 356   2005年9月

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    記述言語：その他   掲載種別：研究論文（その他学術会議資料等）  

    DOI： 10.1016/j.synthmet.2005.07.296

  • Hydrogen Absorption in Size-Controlled Pt Nanoparticle 査読 国際誌

    M. Yamauchi, H. Kitagawa

    Chemical Engineering Transactions   8   159 - 163   2005年5月

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    記述言語：英語  

    その他リンク： https://www.cetjournal.it/index.php/cet/vol01-16

  • Isotope effect in hydrogen/deuterium-absorbing Pd nanoparticles revealed by X-ray powder diffraction and by a multi-component MO method

    Takayoshi Ishimoto, Masanori Tachikawa, Miho Yamauchi, Hiroshi Kitagawa, Hiroaki Tokiwa, Umpei Nagashima

    Journal of the Physical Society of Japan   73 ( 7 )   1775 - 1780   2004年7月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1143/JPSJ.73.1775

  • Two-dimensional self-diffusion of alkylammonium ions located in the interlayer space of tetrasilicicfluormica 査読 国際誌

    Miho Yamauchi, Shin'ichi Ishimaru, Ryuichi Ikeda

    Journal of Physical Chemistry A   108 ( 5 )   717 - 720   2004年2月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/jp035874x

  • A 1H NMR study on the electronic state of a chloride-bridged tetrakis(acetamidato)dirhodium complex 査読 国際誌

    Miho Yamauchi, Yasuaki Takazaki, Zhiyong Yang, Takashi Kawamura, Ryuichi Ikeda

    Chemistry Letters   33 ( 2 )   110 - 111   2004年2月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1246/cl.2004.110

  • Dynamics of n-alkylammonium ions intercalated in saponite 査読 国際誌

    M. Yamauchi, S. Ishimaru, and R. Ikeda

    Journal of Physical Chemistry A   2004年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

  • Two-dimensional Molecular Motions of Guanidinium Ions Confined in the Interlayer Space of Tetrasilicicfluormica

    Miho Yamauchi, Shin'ichi Ishimaru, Ryuichi Ikeda

    Chemistry Letters   32 ( 10 )   976 - 977   2003年10月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1246/cl.2003.976

  • Analysis of isotope effect of hydrogen-absorbing Pd ultra-fine particle by X-ray powder diffraction and first principle multi-component MO calculation

    T. Ishimoto, M. Tachikawa, M. Yamauchi, H. Kitagawa, H. Tokiwa, U. Nagashima

    Chemical Physics Letters   372 ( 3-4 )   503 - 507   2003年4月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1016/S0009-2614(03)00414-7

  • Isotope Effect of Hydrogen-Absorbing Pd Ultrafine Particle -X-ray Powder Diffraction and Multi-Component MO Method- 査読 国際誌

    T. Ishimoto, M. Tachikawa, M. Yamauchi, H. Kitagawa, H. Tokiwa, and U. Nagashima

    Chem. Phys. Lett.   2003年1月

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    記述言語：英語  

  • Dynamics of two-dimensionally arranged n-octylammonium ions intercalated into tetrasilicicfluormica 査読 国際誌

    Miho Yamauchi, Shin'ichi Ishimaru, Ryuichi Ikeda

    Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences   54 ( 12 )   755 - 760   1999年12月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1515/zna-1999-1213

  • Dynamics of Interlayer Cations in Tetramethylammonium-Saponite Studied by 1H, 2H NMR, and Electrical Conductivity Measurements 査読 国際誌

    Shin'ichi Ishimaru, Miho Yamauchi, Ryuichi Ikeda

    Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences   53 ( 10-11 )   903 - 908   1998年11月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1515/zna-1998-10-1116

  • Pluralistic Electronic Structure Modulation of Ruthenium Oxide for Enhanced Acidic Water Electrolysis

    Wu, XT; Lin, C; Hu, WB; Fu, C; Tan, L; Wang, HF; Meharban, F; Pan, XX; Fu, P; Um, HD; Xiao, Q; Li, XP; Yamauchi, M; Luo, W

    SMALL STRUCTURES   5 ( 6 )   2024年6月   （ ISSN:2688-4062 eISSN:2688-4062 ）

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    掲載種別：研究論文（学術雑誌）   出版者・発行元：Small Structures  

    Proton exchange membrane water electrolysis (PEMWE) with high-purity H2 and O2 products and swift response to electricity fluctuation is of great interest for renewable energy, chemical and pharmaceutical industries. Ruthenium oxide shows promise as an alternative to iridium oxide catalysts in PEMWE but suffers from severe anodic corrosion. Herein, a pluralistic electronic structure modulation approach is presented to address the instability issue of Ru, by in situ growing MnxRu1−xO2 solid solution on MnO2, coated carbon fibers (MnxRu1−xO2/MnO2/CFs). Due to higher ion electronegativity, Mn dopants in the MnxRu1−xO2 solid solution accept electrons, activating the Ru site. Simultaneously, the MnO2 support donates electrons to prevent Ru site overoxidation and dissolution due to its lower work function than the MnxRu1−xO2 solid solution. As a result, the MnxRu1−xO2/MnO2/CFs catalyst exhibits a low overpotential of 161 mV at 10 mA cm−2 and a remarkable stability exceeding 600 h. Profiting by its improved oxygen evolution reaction (OER) kinetic activity, the MnxRu1−xO2/MnO2/CF-based PEMWE shows a low cell voltage of 1.9 V at 2 A cm−2, and stably operate at current density of 500 mA cm−2 for 24 h. This work shows the potential of the pluralistic electronic structure modulation to boost activity and stability of Ru-based acidic OER electrocatalysts.

    DOI： 10.1002/sstr.202300518

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  • 元素集積化学を駆使した無機ナノ触媒材料の創製

    山内 美穂

    応用物理   92 ( 4 )   208 - 213   2023年4月   （ ISSN:03698009 eISSN:21882290 ）

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    記述言語：日本語   出版者・発行元：公益社団法人 応用物理学会  

    <p>持続可能なものづくりを実現するには，高効率触媒の開拓が必要となる．本稿では，水を水素源とする電気化学的物質変換反応を活性化するために求められる触媒の組成，配列，構造を議論するとともに，筆者らが開発した無機ナノ触媒の機能を紹介する．初めに，炭素循環の要となるCO<sub>2</sub>還元反応（CO<sub>2</sub>RR）を促進する無機触媒の制御要因について議論する．また，高効率蓄電の新しい方法となる有機酸あるいはケトンからのアルコール化合物を合成するために作製されたTiO<sub>2</sub>をベースとする電極材料を紹介する．さらに，有機酸とケトンの電気化学的還元の応用例として熱電子変換とアミノ酸合成についての研究例を紹介する．</p>

    DOI： 10.11470/oubutsu.92.4_208

    CiNii Research

  • Development of inorganic nanocatalyst materials based on elemental integration chemistry

    Yamauchi Miho

    JSAP Review   2023 ( 0 )   n/a   2023年   （ eISSN:24370061 ）

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    記述言語：英語   出版者・発行元：The Japan Society of Applied Physics  

    <p>This chapter discusses compositions, arrangements, and structures of inorganic nanocatalysts that electrochemically promotes material conversion using water as a hydrogen source and introduces the functions of the nanocatalysts. First, the author summarizes the controlling factors of inorganic nanocatalysts applicable to CO<sub>2</sub> reduction reactions, which are regarded as a critical technology for achieving carbon cycling. TiO<sub>2</sub>-based catalysts electrochemically produce alcoholic compounds from organic acids and ketones, a new method for highly efficient power storage. Furthermore, thermoelectric conversion and amino acid synthesis on the TiO<sub>2</sub> electrocatalyst are introduced as an advanced application of electrochemical reduction of organic acids and ketones.</p>

    DOI： 10.11470/jsaprev.230206

    CiNii Research

  • Bimetallic single atom promoted α-MnO<sub>2</sub> for enhanced catalytic oxidation of 5-hydroxymethylfurfural 査読

    Liao, XM; Guo, MD; Tang, W; Liu, CW; Luo, W; Tan, L; Noguchi, TG; Yamauchi, M; Zhao, YH; Li, XP

    GREEN CHEMISTRY   24 ( 21 )   8424 - 8433   2022年10月   （ ISSN:1463-9262 eISSN:1463-9270 ）

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    記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Green Chemistry  

    We report a synergetic dual-metal single-atom (Pd and Ni) promoting approach that modulates the catalytic activity and selectivity of α-MnO2 toward HMF oxidation. Pd and Ni have different spatial doping profiles and catalytic functions. Pd single atoms are embedded in the crystalline lattice of α-MnO2, which activates lattice oxygen and creates abundant oxygen vacancies. Ni single atoms that are mainly anchored on the surface of α-MnO2 improve the ability to dissociate molecular oxygen for healing oxygen vacancies. Pd and Ni work synergistically to accelerate the consumption and recovery of active lattice oxygen during HMF oxidation, which results in 3 fold enhancement of productivity and near-unity DFF selectivity. Ex situ and in situ characterization together with theoretical calculations confirm the pronounced effects of Pd and Ni on oxygen species. Compared to conventional single atom catalysts requiring a metal loading of 1-10 wt%, a single atom promoter requiring a tiny metal loading <0.5 wt% allows one to significantly improve the activity of α-MnO2

    DOI： 10.1039/d2gc01769e

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  • Bimetallic single atom promoted α-MnO2 for enhanced catalytic oxidation of 5-hydroxymethylfurfural 査読 国際誌

    24 ( 21 )   8424 - 8433   2022年10月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： doi.org/10.1039/d2gc01769e

  • Surface charge dependent structure of ionic liquid/alkali halide interfaces investigated by atomic force microscopy

    Mungse H.P., Okudaira S., Yamauchi M., Ichii T., Utsunomiya T., Maruyama S., Matsumoto Y., Sugimura H.

    Japanese Journal of Applied Physics   61 ( SL )   2022年9月   （ ISSN:00214922 ）

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    出版者・発行元：Japanese Journal of Applied Physics  

    Ionic liquid (IL)/solid interfaces are relevant to a broad range of physicochemical phenomena and technological processes such as catalysis, corrosion, electrochemistry, and lubrication. Hence, understanding the effect of substrate surface nature on the interfacial properties has a significant impact on improving technological processes in which interfacial properties are dominant. In this work, we investigated interfacial structures between 1-butyl-3-methylimidazolium hexafluorophosphate (BMI-PF6) IL and KBr crystal surfaces by frequency modulation atomic force microscopy utilizing a quartz tuning fork sensor. KBr(100) and (111) surfaces were used as the substrates, where the (100) surface is electrically neutral, and the (111) surface is highly charged. We investigated the influence of surface charge on their surface structures and interfacial solvation structures by atomic-scale topographic imaging and frequency shift versus distance curve measurement. The behavior of IL at these two interfaces was found to be significantly different due to these different surface properties.

    DOI： 10.35848/1347-4065/ac528e

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  • Singular behaviour of atomic ordering in Pt-Co nanocubes starting from core-shell configurations 査読 国際誌

    Aso, K; Kobayashi, H; Yoshimaru, S; Tran, XQ; Yamauchi, M; Matsumura, S; Oshima, Y

    NANOSCALE   14 ( 27 )   9842 - 9848   2022年6月   （ ISSN:2040-3364 eISSN:2040-3372 ）

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    記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Nanoscale  

    The ordered structure of platinum–cobalt (Pt–Co) alloy nanoparticles has been studied actively because the structure influences their magnetic and catalytic properties. On the Pt–Co alloy’s surface, Pt atoms preferentially segregate...

    DOI： 10.1039/d2nr01982e

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  • Achieving a Carbon Neutral Future through Advanced Functional Materials and Technologies

    Chapman, A; Ertekin, E; Kubota, M; Nagao, A; Bertsch, K; Macadre, A; Tsuchiyama, T; Masamura, T; Takaki, S; Komoda, R; Dadfarnia, M; Somerday, B; Staykov, AT; Sugimura, J; Sawae, Y; Morita, T; Tanaka, H; Yagi, K; Niste, V; Saravanan, P; Onitsuka, S; Yoon, KS; Ogo, S; Matsushima, T; Tumen-Ulzii, G; Klotz, D; Nguyen, DH; Harrington, G; Adachi, C; Matsumoto, H; Kwati, L; Takahashi, Y; Kosem, N; Ishihara, T; Yamauchi, M; Saha, BB; Islam, MA; Miyawaki, J; Sivasankaran, H; Kohno, M; Fujikawa, S; Selyanchyn, R; Tsuji, T; Higashi, Y; Kirchheim, R; Sofronis, P

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   95 ( 1 )   73 - 103   2022年1月   （ ISSN:0009-2673 eISSN:1348-0634 ）

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    出版者・発行元：Bulletin of the Chemical Society of Japan  

    Current greenhouse gas emissions suggest that keeping global temperature increase below 1.5 degrees, as espoused in the Paris Agreements will be challenging, and to do so, the achievement of carbon neutrality is of utmost importance. It is also clear that no single solution can meet the carbon neutral challenge, so it is essential for scientific research to cover a broad range of technologies and initiatives which will enable the realization of a carbon free energy system. This study details the broad, yet targeted research themes being pioneered within the International Institute for Carbon-Neutral Energy Research (I2CNER). These approaches include hydrogen materials, bio-mimetic catalysts, electrochemistry, thermal energy and absorption, carbon capture, storage and management and refrigerants. Here we outline the state of the art for this suite of technologies and detail how their deployment, alongside prudent energy policy implementation can engender a carbon neutral Japan by 2050. Recognizing that just as no single technological solution will engender carbon neutrality, no single nation can expect to achieve this goal alone. This study represents a recognition of conducive international policy agendas and is representative of interdisciplinary, international collaboration.

    DOI： 10.1246/bcsj.20210323

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  • Synergistic effect of corrosion and residual stress on fatigue cracks of finger-type bridge expansion joints

    Yang, MY; Kainuma, S; Nabeshima, W; Yamauchi, M; Ji, BH

    ENGINEERING FAILURE ANALYSIS   131   2022年1月   （ ISSN:1350-6307 eISSN:1873-1961 ）

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  • Low temperature surface oxygen activation in crystalline MnO<inf>2</inf> triggered by lattice confined Pd single atoms 査読 国際誌

    Xuemei Liao, Yonghui Zhao, Changwen Liu, Xiaopeng Li, Yu Sun, Kenichi Kato, Miho Yamauchi, Zheng Jiang

    Journal of Energy Chemistry   62   136 - 144   2021年11月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1016/j.jechem.2021.03.012

  • Bifunctional electrochemical properties of La0.8Sr0.2Co0.8M0.2O3−δ (M = Ni, Fe, Mn, and Cu): efficient elemental doping based on a structural and pH-dependent study 査読

    Cheng, J; Ganesan, P; Wang, Z; Zhang, M; Zhang, G; Maeda, N; Matsuda, J; Yamauchi, M; Chi, B; Nakashima, N

    MATERIALS ADVANCES   3 ( 1 )   272 - 281   2021年10月   （ eISSN:2633-5409 ）

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    記述言語：その他   掲載種別：研究論文（学術雑誌）   出版者・発行元：Materials Advances  

    Perovskite oxides with a low cost and high catalytic activity are considered as suitable candidates for the oxygen evolution reaction (OER)/oxygen reduction reaction (ORR), but most of them favour only either the ORR or the OER.

    DOI： 10.1039/d1ma00632k

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  • Bragg coherent diffraction imaging allowing simultaneous retrieval of three-dimensional shape and strain distribution for 40–500 nm particles 査読 国際誌

    60 ( SF )   SFFA07 - SFFA07   2021年8月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.35848/1347-4065/ac148b

  • Atomistic Site Control of Pd in Crystalline MnO<inf>2</inf> Nanofiber for Enhanced Electrocatalysis

    Mengmeng Liu, Shang Hu, Yaojia Zhang, Chuyi Zhao, Wenqian Jiang, Chunhong Qi, Xiaohang Zhu, Pengpeng Qiu, Yu Sun, Kenichi Kato, Yonghui Zhao, Xiaopeng Li, Miho Yamauchi, Wei Luo

    Advanced Materials Interfaces   8 ( 8 )   2021年4月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1002/admi.202002060

  • Sintering Activated Atomic Palladium Catalysts with High-Temperature Tolerance of ∼1,000°C 査読

    2 ( 1 )   2021年1月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    Sintering-induced aggregation of active metals is a major cause of catalyst deactivation. Catalysts that can operate above 800°C are rare. Here, we report an unusual noble metal catalyst with sintering-induced activation at temperatures up to 1,000°C. The catalyst consists of atomically dispersed palladium embedded in a reducible SnO support designated for lean methane combustion. High temperature reaction simultaneously causes favorable changes of palladium ensemble state combining synergistically with lattice oxygen activation. Such changes lead to at least one order of magnitude improvement of the intrinsic reactivity, which compensates the surface area loss. Extensive characterizations such as atom probe tomography, X-ray absorption spectroscopy, and isotope tracking together with theoretical calculations illustrate the structure and surface chemistry changes and their impacts on the reaction mechanism. The catalyst also shows notable long-term stability and facile regeneration after poisoning. Our work may provide new insights into designing active and thermally stable catalysts. 2

    DOI： 10.1016/j.xcrp.2020.100287

  • CO<inf>2</inf>-free energy circulation system—Polymer electrolyte alcohol electro-synthesis cell with a low iridium content anode based on in situ growth method

    361   2020年11月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    Alcohol is considered as a potential CO -free energy carrier to replace hydrogen because of its high energy density, appropriate chemical stability and low-cost production. In this study, we describe the development of a simple in situ growth method to prepare a binder free IrO -Ti anode with a very low IrO loading amount (< 0.25 mg cm ), and the obtained catalyst shows a high oxygen evolution reaction (OER) activity and durability in acidic media. The performance of a polymer electrolyte alcohol electrosynthesis cell (PEAEC) using this anode catalyst shows a better performance than that of PEAEC using a typical commercial IrO -Ti paper anode with the loading of IrO = 3 mg cm . Furthermore, the key factors that affect the performance of the PEAEC are determined by comparing the performances of the PEAEC with different anode catalysts. 2 x x 2 2 −2 −2

    DOI： 10.1016/j.electacta.2020.137078

  • A novel self-assembly approach for synthesizing nanofiber aerogel supported platinum single atoms

    Haojie Zhang, Yonghui Zhao, Yu Sun, Qing Xu, Ruoou Yang, Hao Zhang, Chao Lin, Kenichi Kato, Xiaopeng Li, Miho Yamauchi, Zheng Jiang

    Journal of Materials Chemistry A   8 ( 30 )   15094 - 15102   2020年8月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1039/d0ta03207g

  • Wrapping Multiwalled Carbon Nanotubes with Anatase Titanium Oxide for the Electrosynthesis of Glycolic Acid 査読

    Jun Yang, Junfang Cheng, Jie Tao, Manabu Higashi, Miho Yamauchi, Naotoshi Nakashima

    ACS Applied Nano Materials   2 ( 10 )   6360 - 6367   2019年10月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/acsanm.9b01357

  • BiVO <inf>4</inf> /BiOX (X = F, Cl, Br, I) heterojunctions for degrading organic dye under visible light

    30 ( 7 )   1290 - 1296   2019年7月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    The accumulation of organic pollutants in surface water, groundwater, and even drinking water has raised as a serious issue in recent decades. Semiconductor-based photocatalysis has emerged as a green and sustainable approach to find remediate solutions for environmental and energy issues. However, the fast recombination rate of photogenerated charge carriers reduces the photocatalytic efficiency of photocatalysts. In this study, a hydrothermal synthesis method is proposed for preparing four types of p–n heterojunctions, BiVO /BiOX (X = F, Cl, Br, I). BiVO is an n-type semiconductor and BiOX is a p-type semiconductor. Photocatalytic activity tests showed that the BiVO /BiOF has the best photocatalytic performance under visible light, and photoluminescence spectra confirmed the lowest recombination rate of photogenerated charge carriers for BiVO /BiOF as compared with others. 4 4 4 4

    DOI： 10.1016/j.apt.2019.04.002

  • Single atomic Ag enhances the bifunctional activity and cycling stability of MnO<inf>2</inf>

    Shenglin Ni, Haojie Zhang, Yonghui Zhao, Xiaopeng Li, Yu Sun, Jin Qian, Qing Xu, Peng Gao, Dekun Wu, Kenichi Kato, Miho Yamauchi, Yuhan Sun

    Chemical Engineering Journal   366   631 - 638   2019年6月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1016/j.cej.2019.02.084

  • Visible Light Active Bi3TaO7 Nanosheets for Water Splitting 招待 査読 国際誌

    H. Razavi-Khosroshahi,* S. Mohammadzadeh, M. Hojamberdiev, S. Kitano, M. Yamauchi, M. Fuji

    Dalton Trans.   2019年5月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

  • A statistical approach to correct x-ray response non-uniformity in microstrip detectors for high-accuracy and high-resolution total-scattering measurements

    Kenichi Kato, Yoshihito Tanaka, Miho Yamauchi, Koji Ohara, Takaki Hatsui

    Journal of Synchrotron Radiation   26 ( 3 )   762 - 773   2019年5月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1107/S1600577519002145

  • Impact of TiO2-II Phase Stabilized in Anatase Matrix by High Pressure Torsion on Electrocatalytic Hydrogen Production 招待 査読 国際誌

    K. Edalati,* Q. Wang,* H. Eguchi, H. Razavi-Khosroshahi, H. Emami, M. Yamauchi, M. Fuji, Z. Horita

    Mater. Res. Lett.   2019年4月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

  • Composition-controlled synthesis of solid-solution Fe–Ni nanoalloys and their application in screen-printed magnetic films 査読

    21 ( 3 )   2019年3月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    Screen printing is attracting attention as a method for manufacturing magnetic components such as on-chip transformers and inductors. Fe–Ni alloys, which have high saturation magnetizations and permeabilities, are suitable as magnetic materials for screen-printed high-frequency devices. Here, we demonstrate the fabrication of a screen-printed film comprising solid-solution Fe–Ni nanoalloys, which can achieve enhanced permeability and reduced eddy-current losses in high-frequency regions. The Fe–Ni nanoalloys were prepared by chemical reduction using sodium borohydride as a reducing reagent followed by hydrogen reduction. X-ray diffraction measurements, electron microscopy, and inductively coupled plasma spectroscopy revealed that well-mixed Fe Ni nanoalloys (x = 40, 21.5, and 10) with grain sizes of ~ 10 nm were synthesized. The obtained nanoalloys showed high saturation magnetizations comparable to bulk alloys. The screen-printed film using the Fe Ni nanoalloy exhibited the highest permeability of the nanoalloy films. The eddy-current loss was suppressed by the synthesis of nanoscale-grained nanoalloys. The permeability was sufficiently high for application in transformers and inductors. x 100−x 21.5 78.5

    DOI： 10.1007/s11051-019-4497-2

  • An active, selective, and stable manganese oxide-supported atomic Pd catalyst for aerobic oxidation of 5-hydroxymethylfurfural 査読

    Xuemei Liao, Jindou Hou, Ya Wang, Hao Zhang, Yu Sun, Xiaopeng Li, Siyang Tang, Kenichi Kato, Miho Yamauchi, Zheng Jiang

    Green Chemistry   21 ( 15 )   4194 - 4203   2019年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1039/c9gc01674k

  • First-principles calculation of activity and selectivity of the partial oxidation of ethylene glycol on Fe(0 0 1), Co(0 0 0 1), and Ni(1 1 1) 査読

    361   361 - 369   2018年5月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    To recycle ethylene glycol (HOCH CH OH) fuel in alkaline fuel cells, active and selective catalysts for partially oxidizing HOCH CH OH to glycolic acid (HOCH COOH) and oxalic acid ((COOH) ) are required at the anode; in other words, complete oxidation of HOCH CH OH to CO prevents ethylene glycol recycling. We investigate catalyst activity and selectivity for oxidizing HOCH CH OH to HOCH COOH on Fe(0 0 1), Co(0 001), and Ni(1 1 1) via first-principles calculations. We calculate the oxidation reaction path from HOCH CH OH to HOCH COOH without C–C bond dissociation to avoid CO generation. Partial oxidation of HOCH CH OH to HOCH COOH without C–C bond dissociation proceeds as follows: O–H bond dissociation of HOCH CH OH to generate HOCH CH O; C–H bond dissociation of HOCH CH O to generate HOCH CHO; C–H bond dissociation of HOCH CHO to generate HOCH CO; and OH addition to HOCH CO to generate HOCH COOH. The activation energies for O–H bond dissociation of HOCH CH OH and C–H bond dissociation of HOCH CH O and HOCH CHO on Fe(0 0 1) are 20.2, 22.8, and 35.2 kcal/mol, respectively, which are the lowest of the three surfaces. Thus, Fe(0 0 1) is most active. To determine the selectivity, we compare the bond dissociation activation energies. The activation energies for C–C bond dissociation of HOCH CH OH and HOCH CH O on Fe(0 0 1) (66.7 and 39.5 kcal/mol, respectively) are higher than those for O–H bond dissociation of HOCH CH OH (20.2 kcal/mol) and C–H bond dissociation of HOCH CH O (22.8 kcal/mol), implying that the O–H bond of HOCH CH OH and C–H bond of HOCH CH O dissociate before the C–C bond dissociation during oxidation on Fe(0 0 1). In contrast, the activation energies for C–H and C–C bond dissociation of HOCH CHO (35.2 and 32.8 kcal/mol, respectively) are similar. The C–H and C–C bonds therefore dissociate during HOCH CHO oxidation. On Co(0 0 0 1) and Ni(1 1 1), the activation energies for C–C bond dissociation of HOCH CH O and HOCH CHO are lower than those for their C–H bond dissociation. Therefore, Fe(0 0 1) is more active and selective than Co(0 0 0 1) and Ni(1 1 1) for the partial oxidation of HOCH CH OH to HOCH COOH. 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2

    DOI： 10.1016/j.jcat.2018.03.017

  • Double enhancement of hydrogen storage capacity of Pd nanoparticles by 20 at% replacement with Ir 招待 査読 国際誌

    H. Kobayashi, M. Yamauchi, R. Ikeda, T. Yamamoto, S. Matsumura, H. Kitagawa

    Chem. Sci.   2018年5月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

  • Inorganic nanocatalysts for the electronic power circulation using alcohol/carboxylic acid redox couples

    Miho Yamauchi, Sho Kitano, Masaaki Sadakiyo

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY   254   2017年8月

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    記述言語：英語   掲載種別：研究論文（その他学術会議資料等）  

  • Effects of the structure of the Rh3+modifier on photocatalytic performances of an Rh3+/TiO2photocatalyst under irradiation of visible light 査読

    Sho Kitano, Masaaki Sadakiyo, Kenichi Kato, Miho Yamauchi, Hiroyuki Asakura, Tsunehiro Tanaka, Keiji Hashimoto, Hiroshi Kominami

    Applied Catalysis B: Environmental   205   340 - 346   2017年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1016/j.apcatb.2016.12.047

  • Introduction of an amino group on zeolitic imidazolate framework through a ligand-exchange reaction 査読

    Masaaki Sadakiyo, Takahiro Kuramoto, Kenichi Kato, Miho Yamauchi

    Chemistry Letters   46 ( 7 )   1004 - 1006   2017年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1246/cl.170323

  • High-pressure zinc oxide phase as visible-light-active photocatalyst with narrow band gap 査読

    Hadi Razavi-Khosroshahi, Kaveh Edalati, Ji Wu, Yuki Nakashima, Makoto Arita, Yoshifumi Ikoma, Masaaki Sadakiyo, Yuji Inagaki, Aleksandar Tsekov Staykov, Miho Yamauchi, Zenji Horita, Masayoshi Fuji

    Journal of Materials Chemistry A   5 ( 38 )   20298 - 20303   2017年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1039/c7ta05262f

  • Crystal structure of poly[tris (μ-2-dimethylaminomethyl imidazolato) nitratodizinc(II)] 査読 国際誌

    2016年11月

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    記述言語：英語  

    Crystal structure of poly[tris (μ-2-dimethylaminomethyl imidazolato) nitratodizinc(II)]

  • Superionic Conduction in Co-Vacant P2-Na<inf>x</inf>CoO<inf>2</inf> Created by Hydrogen Reductive Elimination 査読 国際誌

    Kenichi Kato, Hidetaka Kasai, Akihiro Hori, Masaki Takata, Hiroshi Tanaka, Susumu Kitagawa, Akira Kobayashi, Nobuki Ozawa, Momoji Kubo, Hidekazu Arikawa, Tatsuya Takeguchi, Masaaki Sadakiyo, Miho Yamauchi

    Chemistry - An Asian Journal   11 ( 10 )   1537 - 1541   2016年5月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1002/asia.201600370

  • Superionic Conduction in Co-Vacant P2-NaxCoO2 Created by Hydrogen Reductive Elimination (Chem. Asian J. 10/2016) 査読

    Kenichi Kato, Hidetaka Kasai, Akihiro Hori, Masaki Takata, Hiroshi Tanaka, Susumu Kitagawa, Akira Kobayashi, Nobuki Ozawa, Momoji Kubo, Hidekazu Arikawa, Tatsuya Takeguchi, Masaaki Sadakiyo, Miho Yamauchi

    11 ( 10 )   1465   2016年5月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    Inside Cover: Superionic Conduction in Co-Vacant P2-NaxCoO2 Created by Hydrogen Reductive Elimination (Chem. Asian J. 10/2016)

    DOI： 10.1002/asia.201600589

  • High-yield synthesis of PVP-stabilized small Pt clusters by microfluidic method

    M. Jakir Hossain, Hironori Tsunoyama, Miho Yamauchi, Nobuyuki Ichikuni, Tatsuya Tsukuda

    Catalysis Today   183 ( 1 )   101 - 107   2012年3月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1016/j.cattod.2011.10.008

  • Organogold clusters protected by phenylacetylene 査読 国際誌

    Prasenjit Maity, Hironori Tsunoyama, Miho Yamauchi, Songhai Xie, Tatsuya Tsukuda

    Journal of the American Chemical Society   133 ( 50 )   20123 - 20125   2011年12月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1021/ja209236n

  • Selective Ethylene Glycol Oxidation Reaction for Carbon Neutral Energy Cycle System 国際誌

    T. Takeguchi, H. Arikawa, M. Yamauchi, and R. Abe

    ECS Transactions   ( 41 )   2011年1月

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    記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

  • New function of hydrogen in materials 査読 国際誌

    M. Okada, A. Kamegawa, J. Nakahigashi, A. Yamaguchi, A. Fujita, M. Yamauchi

    Mater. Sci. Eng. B   173   253 - 259   2010年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： doi.org/10.1016/j.mseb.2010.02.004

  • Size-controlled stabilization of the superionic phase to room temperature in polymer-coated AgInanoparticles 査読 国際誌

    Rie Makiura, Takayuki Yonemura, Teppei Yamada, Miho Yamauchi, Ryuichi Ikeda, Hiroshi Kitagawa, Kenichi Kato, Masaki Takata

    Nature Materials   8 ( 6 )   476 - 480   2009年6月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1038/nmat2449

  • Atomic-Level Pd-Au Alloying and Controllable Hydrogen-Absorption Properties in Size-Controlled Nanoparticles Synthesized by Hydrogen Reduction Method 査読 国際誌

    K. Kobayashi, M. Yamauchi, R. Ikeda, H. Kitagawa

    Chem. Commun.   2009年1月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

  • Pdナノ粒子の水素吸蔵特性

    山内 美穂, 北川 宏

    九州大学低温センターだより   ( 1 )   3 - 7   2007年3月

    　詳細を見る

    記述言語：日本語  

    DOI： 10.15017/14766

  • Powder XRD and Solid-State 2H NMR Studies on RAP-Protected Palladium Nanoparticle (RAP=Rubeanic-Acid Polymer) 査読 国際誌

    M.Fujishima, M. Yamauchi, R. Ikeda, T. Kubo, K. Nakasuji andH. Kitagawa

    Solid State Phenom   111   107 - 110   2005年7月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.4028/3-908451-18-3.107

  • Structures and dynamics of n-dodecyltrimethylammonium ions intercalated into sodium octosilicate and tetrasilicicfluoromica

    Emi Shinohara, Miho Yamauchi, Shin'ichi Ishimaru, Ryuichi Ikeda

    Journal of Physics Condensed Matter   15 ( 43 )   7253 - 7259   2003年11月

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    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1088/0953-8984/15/43/009

  • A new semiconducting organic-inorganic nanocomposite, 1,5-diaminonphthalene-saponite intercalation compound 査読 国際誌

    Shin'ichi Ishimaru, Miho Yamauchi, Ryuichi Ikeda

    Solid State Communications   127 ( 1 )   57 - 59   2003年6月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1016/S0038-1098(03)00353-3

  • Spin Polarization in Infinite Zigzag Chains of [Rh2(HNCOCH3)4Cl]n 査読 国際誌

    M. Yamauchi, A. B. Koudriavtsev, R. Ikeda, Z. Yang, and T. Kawamura

    Mol. Cryst. Liq. Cryst.   ( 379 )   321 - 326   2002年1月

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    記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

    DOI： doi.org/10.1080/713738627

  • Dynamics of n-Octylammonium Ions Intercalated in Saponite 査読 国際誌

    M. Yamauchi, S. Ishimaru, and R. Ikeda

    Mol. Cryst. Liq. Cryst.,   2000年1月

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    記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

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所属学協会

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共同研究・競争的資金等の研究課題

  • イオン渋滞現象の解明に向けた高度計測技術の統合利用

    研究課題/領域番号：24H02205  2024年4月 - 2029年3月

    科学研究費助成事業  学術変革領域研究(A)

    中村 崇司, 桑田 直明, 吉田 秀人, 阿部 仁, 杉本 敏樹, 山内 美穂, 梅垣 いづみ, 石黒 志, 森 一広, 白澤 徹郎

    　 詳細を見る

    資金種別：科研費

    本学術変革領域研究では、イオン伝導体、触媒、蓄電池材料などにおけるイオンの集団運動効果を数理科学により解き明かすことを領域目標としている。この実現に向けて、計画研究A03は高度な計測技術を複合的に活用することで、イオンの集団運動を捉えることを目的とする。A02より提供される高品質なモデル材料に対して、イオンが実際に流れる状態を創り出し、複数のプローブ・計測技術を組み合わせることでイオンダイナミクスを多角的に評価する（オペランドマルチモーダル計測）。
    以上の取り組みにより、これまで未解明であったイオン流を計測により明らかにし、さらに、理論家と材料合成研究者を巻き込んだ新たな研究の進め方を構築する。

    CiNii Research

  • 電気化学的二酸化炭素還元のための高機能電極の開拓

    研究課題/領域番号：23KF0061  2023年4月 - 2025年3月

    科学研究費助成事業  特別研究員奨励費

    山内 美穂, RABIEE HESAMODDIN

    　 詳細を見る

    資金種別：科研費

    CiNii Research

  • 電気化学的二酸化炭素還元のための高機能電極の開拓

    研究課題/領域番号：22F22736  2022年11月 - 2025年3月

    科学研究費助成事業  特別研究員奨励費

    山内 美穂, RABIEE HESAMODDIN

    　 詳細を見る

    資金種別：科研費

    CiNii Research

  • Pt族金属ナノ粒子の水素吸蔵

    研究課題/領域番号：15915009  2003年

    日本学術振興会  科学研究費助成事業  奨励研究

    　 詳細を見る

    資金種別：科研費

  • Mg合金ナノ粒子の水素吸蔵特性

    研究課題/領域番号：14915007  2002年

    日本学術振興会  科学研究費助成事業  奨励研究

    　 詳細を見る

    資金種別：科研費

担当授業科目

  • 無機化学特論ⅢB

    2023年12月 - 2024年2月   冬学期

  • 無機化学特論ⅢA

    2023年10月 - 2023年12月   秋学期

  • 身の回りの化学

    2023年6月 - 2023年8月   夏学期

  • 身の回りの化学

    2023年6月 - 2023年8月   夏学期

  • 身の回りの化学

    2023年4月 - 2023年6月   春学期

  • 身の回りの化学

    2023年4月 - 2023年6月   春学期

  • 無機化学特論ⅢB

    2021年12月 - 2022年2月   冬学期

  • Advanced Inorganic Chemistry ⅢB

    2021年12月 - 2022年2月   冬学期

  • Advanced Inorganic Chemistry Ⅲ（R2以前入学者用）

    2021年10月 - 2022年3月   後期

  • Advanced Inorganic Chemistry ⅢA

    2021年10月 - 2021年12月   秋学期

  • 無機化学特論ⅢA

    2021年10月 - 2021年12月   秋学期

  • 無機化学特論III

    2019年10月 - 2020年3月   後期

  • Advanced Inorganic Chemistry Ⅲ

    2019年10月 - 2020年3月   後期

  • Advanced Inorganic Chemistry　Ⅲ

    2019年10月 - 2020年3月   後期

  • Advanced Inorganic Chemistry Ⅲ

    2018年10月 - 2019年3月   後期

  • 無機化学特論Ⅲ

    2017年10月 - 2018年3月   後期

  • Advanced Inorganic Chemistry Ⅲ

    2017年10月 - 2018年3月   後期

  • 無機化学特論Ⅲ

    2017年10月 - 2018年3月   後期

  • 無機化学実験

    2006年10月 - 2007年3月   後期

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  • 2021年2月   役割：講演   名称：カーボンニュートラルに関する研究発表

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  • 2024年  東北大学材料科学高等研究所  区分:兼任教員 

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    2018年1月

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    シュウ酸からグリコール酸、『世界初』連続合成装置開発、九大が成果、次世代燃料実用化期待

  • 九大、電力のみを使ってシュウ酸からグリコール酸を連続的に合成する装置の開発に成功 新聞・雑誌

    2017年12月

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    九大、電力のみを使ってシュウ酸からグリコール酸を連続的に合成する装置の開発に成功

  • グリコール酸の連続合成ー次世代燃料に期待ー 新聞・雑誌

    2017年12月

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    グリコール酸の連続合成ー次世代燃料に期待ー

  • 九大、再エネの電力をアルコール燃料として貯蔵、装置開発-電力のみでシュウ酸からグリコール酸を合成する固体高分子型合成装置- 新聞・雑誌

    2017年2月

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    九大、再エネの電力をアルコール燃料として貯蔵、装置開発-電力のみでシュウ酸からグリコール酸を合成する固体高分子型合成装置-