2024/10/07 更新

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写真a

ソン ジユンテ
SONG JUN TAE
SONG JUNTAE
所属
工学研究院 応用化学部門 助教
工学部 応用化学科(併任)
職名
助教
連絡先
メールアドレス
電話番号
0928026709

学位

  • 博士(工学)(東京工業大学, 日本)

  • 修士(工学)(Kyungpook National University, Repulic of Korea)

  • 学士(工学)(Kyungpook National University, Repulic of Korea)

研究テーマ・研究キーワード

  • 研究テーマ:亜鉛空気電池の開発

    研究キーワード:亜鉛空気電池、空気極、酸素発生反応、酸素還元反応

    研究期間: 2023年4月 - 2026年5月

  • 研究テーマ:光電気化学機能電極触媒

    研究キーワード:光電気化学、水分解

    研究期間: 2022年2月 - 2024年5月

  • 研究テーマ:電気化学的なCO2還元触媒開発

    研究キーワード:電気化学, 触媒

    研究期間: 2019年8月

受賞

  • 11th KINC Fusion Research Award

    2021年4月   KAIST Institute for Nanocentry  

論文

  • Bi/UiO-66-derived electrocatalysts for high CO2-to-formate conversion rate 査読 国際誌

    #Yuta Takaoka, @Jun Tae Song, @Atsushi Takagaki, @Motonori Watanabe, @Tatsumi Ishihara

    Applied Catalysis B: Environmental   326   122400   2023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)  

    リポジトリ公開URL: https://hdl.handle.net/2324/7172333

  • Infiltration of cerium into a NiO–YSZ tubular substrate for solid oxide reversible cells using a LSGM electrolyte film 査読 国際誌

    9 ( 3 )   1530 - 1540   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: 10.1039/d0ta08564b

  • BaZr(Ce,Y)O<sub>3</sub>-Pr-Doped CeO<sub>2</sub> Double Columnar for the Cathodic Functional Layer of Ni-Fe Metal-Supported Protonic Ceramic Fuel Cells

    Kim, HY; Watanabe, M; Song, JT; Inada, M; Ishihara, T

    ACS APPLIED ENERGY MATERIALS   7 ( 18 )   7945 - 7955   2024年9月   ISSN:2574-0962

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    出版者・発行元:ACS Applied Energy Materials  

    Metal-supported protonic ceramic fuel cells were prepared, and the effects of a double columnar layer at the cathode side of BaZr0.44Ce0.36Y0.2O3 (BZCY) on power density and open-circuit voltage (OCV) were studied. The double columnar structure of Pr0.2Ce0.8O2 (PrDC) and BZCY was prepared with pulsed laser deposition. It was found that the insertion of the double columnar layer was highly effective for increasing the power density and OCV. The optimum composition of the double columnar was BZCY:PrDC = 7:3, with a thickness of 200 nm. The power density of PCFCs with the BZCY-PrDC double columnar reached 413 mW/cm2, and the OCV was approximately 1.05 V at 873 K, which is six times higher than that of a cell without a functional layer. The high power density of the cell was attributed to the decreased overpotential of the cathode. Therefore, the BZCY-PrDC double columnar layer is effective in expanding the reaction site by increasing the proton concentration at the cathodic interface.

    DOI: 10.1021/acsaem.4c01529

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  • Nanocomposite of Nb-based binary phase for lowering the activation energy of Li<SUP>+</SUP> intercalation as an anode for high-performance aqueous dual-ion batteries

    Yang, DY; Matsuda, J; Song, JT; Watanabe, M; Ishihara, T

    JOURNAL OF MATERIALS CHEMISTRY A   12 ( 22 )   13338 - 13347   2024年6月   ISSN:2050-7488 eISSN:2050-7496

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    出版者・発行元:Journal of Materials Chemistry A  

    Aqueous dual-ion batteries have good safety, environmental compatibility, and low cost due to the use of an aqueous electrolyte. However, water electrolysis occurs during charging at high potential, resulting in a poor cyclic stability of aqueous dual-ion batteries. Hence, novel anode materials are urgently needed to be developed for aqueous dual-ion batteries with low water electrolysis. A niobium-based binary-phase composite material is reported with a capacity of 135 mA h g−1 at a current density of 0.2 mA cm−2 and with excellent reversibility in the potential range of −1.3-0 V vs. Ag/AgCl. The activation energy of Li+ intercalation was obviously decreased because of the formation of an interface, which enhanced the Li+ intercalation reaction between FeNbO4 and MoNb12O33. In addition, the lower amount of Fe2+ in the lattice of MoNb12O33 caused localized compressive strain, which promoted fast Li+ diffusion in MoNb12O33. A full dual-ion battery of 3.0 V was constructed using the binary-phase niobium-based composite for the anode, and demonstrated a high cycle stability and an average coulombic efficiency of 91% over 300 cycles. Furthermore, considering both the electrolyte and electrode materials, the theoretical energy density of this dual-ion battery was estimated to be 250 W h kg−1, which is close to that of the current Li-ion rechargeable battery.

    DOI: 10.1039/d4ta01293c

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  • [FeFe]-Hydrogenase Encapsulated in Zeolitic Imidazolate Framework (ZIF)-8 Nanoparticles as a Robust Biocatalyst for Photocatalytic Hydrogen Production

    Kosem, N; Ohsaki, Y; Watanabe, M; Song, JT; Ishihara, T

    ACS SUSTAINABLE CHEMISTRY & ENGINEERING   12 ( 16 )   6300 - 6309   2024年4月   ISSN:2168-0485

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    出版者・発行元:ACS Sustainable Chemistry and Engineering  

    [FeFe]-hydrogenase (HydA) is an active biocatalytic enzyme for solar-to-hydrogen (H2) conversion. However, stability is a main challenge that limits practical applications. This work aims to encourage the efficiency of HydA by encapsulating it in the zeolitic imidazolate framework-8 (ZIF-8) as a synthetic protective shield. The construction of HydA@ZIF-8 nanoparticles, with an average diameter of 700-1000 nm, at ambient conditions can preserve HydA activity within a spatially confined microenvironment, as characterized by scanning electron microscopy and X-ray diffraction analysis. Based on MV•+-dependent H2 production activity and kinetic analysis, both the stability and efficiency of HydA@ZIF-8 surpass those of free HydA and whole-cell biocatalysts over a wider range of pH and temperature. The achievement of robust HydA@ZIF-8 construction represents a significant step forward in the development of biocatalysts for various future applications.

    DOI: 10.1021/acssuschemeng.3c08560

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  • Suppressed Gold Penetration with the Molybdenum Oxide Interlayer to Increase Power Conversion Efficiency of Perovskite Solar Cells

    Purev-Ochir, B; Song, JT; Wang, PP; Yahiro, M; Yamada, S; Nakanotani, H; Matsushima, T; Adachi, C

    SOLAR RRL   8 ( 8 )   2024年4月   ISSN:2367-198X

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    出版者・発行元:Solar RRL  

    Perovskite solar cells (PSCs) have undergone an unprecedentedly rapid development in both power conversion efficiency (PCE) and operational durability. However, a number of unknown challenges remain before PSC products are ready to launch. Herein, it is demonstrated that the vacuum deposition of gold (Au) onto the organic hole-transport layer (HTL) results in Au penetration into the perovskite layer. This Au penetration proves to be a limiting factor in PCE due to detrimental carrier recombination caused by the penetrated Au component inside the perovskite light absorber. To mitigate this issue, a thin molybdenum oxide (MoOx) interlayer between the organic HTL and the Au electrode is introduced, effectively reducing the Au penetration and suppressing the carrier recombination. Consequently, this MoOx introduction increases PCEs from ≈16.9% to ≈19.6% by ≈2.7%. Furthermore, using the MoOx interlayer improves the long-term durability of PSCs. These findings are crucial in elucidating a basic mechanism that limits PCE and in advancing the fabrication of PSC products with even higher performance.

    DOI: 10.1002/solr.202400029

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  • Surface Modification of NiFe Anode-Support for Thin-Film Solid-Oxide Fuel Cell

    Khan, S; Song, JT; Watanabe, M; Ishihara, T

    ELECTROCHEMISTRY   92 ( 3 )   037005 - 037005   2024年3月   ISSN:13443542 eISSN:21862451

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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:公益社団法人 電気化学会  

    A dense NiO-Fe2O3 (NiFe) pellet has been developed as a potential anode-support for thin-film solid oxide fuel cells (SOFCs). However, preparation of dense NiFe is very challenging. Hole-formed NiFe pellets or porous NiFe pellets are frequently formed, which cannot be used as a support (substrate) for thin-film SOFCs. Therefore, this hole-formed NiFe support is simply wasted. In this report, we attempt to re-qualify this NiFe support to be a valuable substrate, which can be used for fabricating thin-film SOFCs. By deposition of smaller NiFe particles to cover the hole-formed NiFe support, the surface of this NiFe pellet is modified. Large holes on the surface disappear. The newly formed NiFe support can be used for fabricating a single cell with La0.9Sr0.1Ga0.8Mg0.2O3−δ as thin-film electrolyte operated at intermediate temperature. Maximum power density generated from this cell is 0.45, 0.86 and 1.28 W cm−2 at 873, 923 and 973 K, respectively. (Figure Presented).

    DOI: 10.5796/electrochemistry.23-00164

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  • Photobiocatalytic conversion of solar energy to NH3 from N2 and H2O under ambient condition 招待 査読 国際誌

    @Nuttavut Kosem, #Xiao-feng Shen, @Yutaka Ohsaki, @Motonori Watanabe, @Jun Tae Song, @Tatsumi Ishihara

    Applied Catalysis B: Environmental   2024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)  

  • Mitigating Defect States of All-Inorganic CsPbI<sub>2</sub>Br Perovskite via Multifunctional 2-Amino-5-Nitrothiazole Additive for an Efficient Air-Processed Outdoor/Indoor Photovoltaics

    Bahadur, J; Cho, S; Pandey, P; Yoon, S; Lee, DG; Ryu, J; Song, JT; Lim, J; Kang, DW

    SOLAR RRL   8 ( 5 )   2024年3月   ISSN:2367-198X

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    出版者・発行元:Solar RRL  

    All-inorganic CsPbI2Br mixed halide perovskites show promise as wide-bandgap photoabsorbers in photovoltaics. However, the rapid crystal growth observed in solution-processed CsPbI2Br often leads to morphologies plagued by pinholes and defects, which limit device performance. This study introduces 2-Amino-5-nitrothiazole (ANT), an innovative precursor additive, to enhance film quality. ANT's selective interactions with the perovskite precursor moderate the crystal growth, resulting in a dense, flawless CsPbI2Br film characterized by superior crystallinity and coverage. Furthermore, the -NH2 group in ANT coordinates with Pb octahedra, effectively mitigating charge defects through NH=I/Br bonds. Simultaneously, S=C-N sites interact with uncoordinated Pb2+ ions, reducing defect states and nonradiative recombination. This innovation achieves an impressive device efficiency of 17.13% with a fill factor (FF) of 83.41%, surpassing the control's efficiency of 15.21% (FF of 80.45%). Notably, the champion device maintains an efficiency of 29.47% under indoor light-emitting diode lighting at 1000 lux. Additionally, the optimized perovskite solar cell demonstrates remarkable stability, retaining ≈90% of its efficiency for over 720 h at 85 °C in air, even without encapsulation.

    DOI: 10.1002/solr.202300912

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  • Photobiocatalytic conversion of solar energy to NH<sub>3</sub> from N<sub>2</sub> and H<sub>2</sub>O under ambient condition

    Kosem, N; Shen, XF; Ohsaki, Y; Watanabe, M; Song, JT; Ishihara, T

    APPLIED CATALYSIS B-ENVIRONMENTAL   342   123431 - 123431   2024年3月   ISSN:0926-3373 eISSN:1873-3883

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Catalysis B: Environmental  

    NH3 is an important chemical fertilizer and expecting as H2 carrier. Several methods have been investigated for eco-friendly NH3 production under mild conditions instead of Haber-Bosch process using 400 °C, 20 MPa. Here, cyanobacterial Anabaena variabilis was utilized as a nitrogenase-producing biocatalyst that converts N2/H2O to NH3 under ambient conditions. Biocatalytic reactions revealed that MV•+ can penetrate cell membrane and transfer electrons generated in inorganic photocatalyst. We first reported photobiocatalytic NH3 production of cyanobacteria and TiO2. Comparing with natural system, NH3 formation rate of the hybrid system increased 81.3 times with an initial rate of 2031.7 nmol·h−1 and turnover number of 216.8.

    DOI: 10.1016/j.apcatb.2023.123431

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  • Hot-Antisolvent Assisted Morphological Regulation of Perovskites for Semitransparent Photovoltaics Employing Hot-Pressing Approach

    Lee, DG; Pandey, P; Bahadur, J; Song, JT; Cho, JS; Kang, DW

    INTERNATIONAL JOURNAL OF ENERGY RESEARCH   2024   2024年2月   ISSN:0363-907X eISSN:1099-114X

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    出版者・発行元:International Journal of Energy Research  

    The processing of halide perovskites in the air significantly influences their morphology and surface coverage, often leading to the presence of numerous trap densities that adversely affect device performance. In this study, we explored the development of perovskite films using a solvent extraction method, where the temperature of the anisole antisolvent was varied. Our findings demonstrate that the hot-antisolvent strategy effectively controls nucleation, resulting in the formation of highly dense, pinhole-free, and crack-free perovskite films with reduced surface roughness. Films fabricated using this hot-antisolvent approach exhibited enhanced photoluminescence, indicating lower trap density and increased recombination resistance. They also showed slower charge carrier recombination rates and efficient charge extraction, suggesting the suppression of nonradiative recombination. Furthermore, the superior quality of perovskite films obtained through the hot-antisolvent strategy significantly enhanced the power conversion efficiency (PCE) of hot-pressed semitransparent perovskite solar cells. The PCE remarkably increased from 0.13% to an impressive 12.65% while maintaining an average visible transmittance of 26.55% and exceptional air stability for 2000 hours with no significant degradation in initial PCE. This study achieves a record-breaking light utilization efficiency of 3.36% in the realm of research on hot-press processes.

    DOI: 10.1155/2024/9417829

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  • Controlled Pore Size of NiO-YSZ Tubular Substrate for Improved Performance of Reversible Solid Oxide Cell Using LaGaO<sub>3</sub> Electrolyte Film

    Liu, B; Zhe, T; Kim, S; Song, JT; Watanabe, M; Ishihara, T

    JOURNAL OF THE ELECTROCHEMICAL SOCIETY   171 ( 2 )   024504 - 024504   2024年2月   ISSN:0013-4651 eISSN:1945-7111

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of the Electrochemical Society  

    Effects of channel size in NiO-YSZ porous substrate were studied on power density in solid oxide fuel cell mode and electrolysis current in steam electrolysis mode. It was found that the cell deposited on anode substrate with larger pore diameter shows a superior performance. The LSGM cell prepared on Ni-YSZ tube with average channel diameter of ca. 2.5 μm shows the maximum power density of 0.36 W cm−2 in SOFC mode and 0.42 A cm−2 at 1.6 V in SOEC mode at 873 K. Spike potential noise which may be caused by insufficient gas diffusion in NiO-YSZ porous substrate was observed under constant current electrolysis condition in case of NiO-YSZ tube with narrow channel and the spike noise is suppressed by increasing channel size. NiO-YSZ tube with large channel size is also effective for increasing long term stability in electrolysis mode.

    DOI: 10.1149/1945-7111/ad2815

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    その他リンク: https://iopscience.iop.org/article/10.1149/1945-7111/ad2815/pdf

  • Enhanced charge mediator properties of photocatalysts with reduced graphene nanoribbons for photocatalytic acceleration of hydrogen production in aqueous media

    Morita, R; Murakami, Y; Shen, XF; Yang, DY; Watanabe, M; Song, JT; Takagaki, A; Ishihara, T

    JOURNAL OF MATERIALS CHEMISTRY C   12 ( 5 )   1652 - 1660   2024年2月   ISSN:2050-7526 eISSN:2050-7534

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Materials Chemistry C  

    In this study, a hybrid photocatalyst with titanium oxide using reduced graphene nanoribbons (rGNR) was fabricated. The resulting 0.5 wt% platinum-loaded titanium oxide-supported reduced GNRs (Pt/TiO2/rGNR) exhibited an activity of 2.54 mmol h−1 g−1 which is 6.35 times higher than the 0.40 mmol h−1 g−1 of the titanium oxide photocatalyst. This activity was also higher than that of the starting material, multi-walled carbon nanotube (MWCNT)-supported titanium oxide (Pt/TiO2/MWCNT) as 0.80 mmol h−1 g−1. The resulting catalysts were characterized by X-ray photoelectron spectroscopy (XPS) and fluorescence lifetime spectroscopy, and the GNRs chemically reduced by NaBH4 (rGNR) had higher conductivity than the GNRs reduced by photogenerated electrons (pGNR) from titanium oxide. It was found using the photocatalytic reaction and photocurrent test that almost no photoresponsivity of reduced GNR character was exhibited. This result clarified that the reduced GNRs played the role of a mediator that promotes charge separation between photocatalysts and that effective hydrogen production in water was achieved.

    DOI: 10.1039/d3tc03622g

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  • Controlled Pore Size of NiO-YSZ Tubular Substrate for Improved Performance of Reversible Solid Oxide Cell Using LaGaO3 Electrolyte Film 査読 国際誌

    Journal of The Electrochemical Society   2024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)  

  • Visible light driven hydrogen peroxide production by oxygen and phosphorus co-doped CoP-C<sub>3</sub>N<sub>4</sub> photocatalyst

    Jinguji, K; Watanabe, M; Morita, R; Takaoka, Y; Hossain, MS; Song, JT; Takagaki, A; Matsuda, J; Ishihara, T

    CATALYSIS TODAY   426   114400 - 114400   2024年1月   ISSN:0920-5861 eISSN:1873-4308

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

    Photocatalytic hydrogen peroxide (H2O2) by oxygen and phosphorus co-doped graphitic carbon nitride (C3N4) with cobalt phosphate (CoP) cocatalyst is investigated. The photocatalyst powder of CoP-C3N4 1:n, n = 0–4, n is the weight ratio of cyanuric acid added) was synthesized by melamine cyanurate template method. Characterization of the catalyst was performed by X-ray diffraction analysis, and scanning electron microscopy, X-ray photoemission spectra, and fluorescence decay spectra. Oxygen doping was performed by the melamine and cyanuric acid template method, followed by phosphorus doping of the C3N4 backbone by the introduction of CoP. Co-doping of O and P atom facilitated charge transfer on the C3N4 backbone, while CoP facilitated charge separation at the C3N4 interface. The CoP-C3N4 (1:4) photocatalyst increased H2O2 production rate by 293 % compared to that of the cyanuric acid-free photocatalyst and also achieved the photocatalytic oxygen evolution from water. These results indicate that O,P co-doped CoP-C3N4 can perform sacrificial agent-free hydrogen peroxide under visible light irradiation.

    DOI: 10.1016/j.cattod.2023.114400

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  • Enhanced charge mediator properties of photocatalysts with reduced graphene nanoribbons for photocatalytic acceleration of hydrogen production in aqueous media 査読 国際誌

    Journal of Materials Chemistry C   2023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)  

  • Oxide ion conductivity in doped bismuth gallate mullite type oxide, Bi2Ga4O9

    Kluczny, M; Nguyen, T; Song, JT; Watanabe, M; Takagaki, A; Staykov, A; Ishihara, T

    SOLID STATE IONICS   401   116343 - 116343   2023年11月   ISSN:0167-2738 eISSN:1872-7689

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Solid State Ionics  

    Mullite-phase bismuth gallate (Bi2Ga4O9) was successfully synthesized with partial substitution of bismuth with alkaline-earth cation, Mg2+, Ca2+, Sr2+, and Ba2+. The effect of this substitution on the electrical conductivity was investigated. In this study, substitution with Ca2+ of Bi site was further studied for increasing the ionic conductivity as well as the phase stability in reducing atmospheres. Substitution with Ca2+ was found to be the most effective and with 12.5 mol% of Ca2+ as the optimized doping amount. Conductivity and stability in reducing atmospheres was increased down to pO2 ≤ 10−19 atm while keeping the conductivity of σ = 2.6 × 10−2 S·cm−1 at 973 K largely independent of oxygen partial pressure. Oxygen permeation analysis estimates 76% of theoretical oxygen permeation rate at 973 K suggesting main charge carrier is oxide ion. Partial electronic conductivity was measured with the ion blocking method. Oxide ion conductivity is dominated over wide pO2 range excepting for hole conduction at high pO2. Density functional theory (DFT) analysis on oxide ion diffusion route suggests oxygen hoping through lattice vacancy is main pathway for oxide ion conductivity in this doped Bi2Ga4O9. Despite the low oxide ion conductivity in Mullite-phase oxide, it was found that Ca doped Bi2Ga4O9 shows good oxide ion conductivity over wide pO2 range.

    DOI: 10.1016/j.ssi.2023.116343

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  • Surface defect passivation of All-Inorganic CsPbI2Br perovskites via fluorinated ionic liquid for efficient Outdoor/Indoor photovoltaics processed in ambient air

    Bahadur, J; Cho, SW; Pandey, P; Ryu, J; Yoon, S; Lee, DG; Song, JT; Cho, JS; Kang, DW

    APPLIED SURFACE SCIENCE   637   2023年11月   ISSN:0169-4332 eISSN:1873-5584

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    出版者・発行元:Applied Surface Science  

    All-inorganic α-CsPbI2Br perovskite has garnered considerable interest due to its optical bandgap (∼1.92 eV) suitable for tandem architectures and superior thermal stability. However, CsPbI2Br based perovskite solar cells (PSCs) exhibit severe energy loss due to presence of various surface defects like uncoordinated Pb2+ ions, halide ion vacancies and pinholes, which causes serious non-radiative recombination and limit the further improvement in power conversion efficiency (PCE). Surface passivation strategy is an effective approach to produce high quality α-CsPbI2Br film. Herein, we introduce fluorinated ionic liquid, 3-(Trifluoromethyl) benzylamine (CFBA), as surface passivating agent. The chemical analysis shows that the trifluoro (-CF3) and amine groups of CFBA strongly interacted with perovskite surface via forming Pb-F and H-I bonding, respectively. The high electronegative fluoride atoms of -CF3 group allow for electrostatic interaction with uncoordinated Pb2+ ions, which built a robust shield that protected against surrounding moisture as well. In addition, CFBA modification passivates the dangling bonds, enhanced crystallinity, reduced pinholes, improved the surface coverage and compactness, increased hydrophobicity, and decreased non-radiative recombination, leading to high PCE. With optimum concentration of 3 μL-CFBA, CsPbI2Br PSC revealed an impressive PCE of 17.07% with FF of 83.21% as compared to pristine device (PCE of 15.24% with FF of 79.81%). Moreover, champion device showed an excellent thermal stability by retaining ∼ 86.23% of its initial PCE, whereas pristine device maintained ∼ 48.26% of its original PCE after 1440 h aging at 85 ℃ in a dry box without any encapsulation. In addition, optimized PSC showed a decent indoor PCE of 23.24% as compared to pristine device (18.35%) under dim lighting conditions (LED, 3200 K) at 1000 lx. These results suggested that surface passivation strategy with CFBA is a promising approach for developing efficient all-inorganic CsPbI2Br outdoor/indoor PSCs with better thermal stability.

    DOI: 10.1016/j.apsusc.2023.157901

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  • Surface defect passivation of All-Inorganic CsPbI2Br perovskites via fluorinated ionic liquid for efficient Outdoor/Indoor photovoltaics processed in ambient air 査読 国際誌

    Applied Surface Science   2023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)  

  • The acceleration of BODIPY dye-sensitized photocatalytic hydrogen production in aqueous ascorbic acid solutions using alkyl-chain formed second coordination sphere effects

    Shen, XF; Watanabe, M; Song, JT; Takagaki, A; Abe, T; Tanaka, K; Ishihara, T

    JOURNAL OF MATERIALS CHEMISTRY A   11 ( 39 )   21153 - 21160   2023年10月   ISSN:2050-7488 eISSN:2050-7496

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Materials Chemistry A  

    BODIPY (boron-dipyrromethene) compounds are extensively utilized in various applications. Typically, their activity is modified by altering the functional groups at the α-, β-, and meso-positions of the substituents. However, no systematic information has been provided regarding the effects of substituted F- positions and hydrophobicity on the activity of BODIPY sensitizers in photosensitizing chemistry. Dyes (7a-7c) with different alkyl chain lengths were synthesized and compared with the unsubstituted compound 3 to discuss the effects of -F position substituents and the hydrophobicity of BODIPY dyes on photocatalytic activity. Density functional theory (DFT) calculations showed that -F-substitution induced an intramolecular charge transfer (ICT) effect, enhancing visible-light absorption. Longer alkyl chains provided a favourable second coordination sphere reaction environment for hydrogen production. Experimentally, dye 7c demonstrated the highest activity, with a hydrogen production rate of 496.5 μmol gcat−1 h−1, which is 3 times higher than that of 3, and a 9.6 times higher turnover frequency (TOF) than that of 3. The apparent quantum yield (AQY) at 650 nm was 1.4%. This study highlights the importance of -F position substitution and optimizing hydrophobicity to enhance the photocatalytic activity of metal-free organic dyes through the creation of a new second coordination sphere.

    DOI: 10.1039/d3ta03682k

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  • Visible light driven hydrogen peroxide production by oxygen and phosphorus co-doped CoP-C3N4 photocatalyst 査読 国際誌

    Catalysis Today   2023年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  • Proton conductivity in Yb-doped BaZrO3-based thin film prepared by pulsed laser deposition 査読 国際誌

    Niwa, E; Kluczny, M; Kim, HY; Song, JT; Watanabe, M; Takagaki, A; Ishihara, T

    SOLID STATE IONICS   396   116240 - 116240   2023年8月   ISSN:0167-2738 eISSN:1872-7689

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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:Solid State Ionics  

    For increasing the performance of PCFC (Protonic Ceramic Fuel Cells), it is important to prepare high-quality thin films of electrolyte materials. In this study, the preparation condition of the thin film of BaZr0.8Yb0.2O2.9 (BZYb) by pulsed laser deposition (PLD) method was optimized and the electrical conductivities of the obtained films were measured. The thin film was prepared by PLD using two kinds of BZYb targets, which were prepared by solids state reaction and Pechini method. Both thin-film samples have the single phase of the cubic perovskite-type structure, however, morphology as well as the orientation of the BZYb film was significantly different. The thin film using the target material by Pechini method is a high crystalline orientation and partially oriented [211] direction. The electrical conductivities of the obtained thin films at reduction atmosphere are dominated by proton conductivity, which is almost the same as that of the bulk sample despite [211] orientation.

    DOI: 10.1016/j.ssi.2023.116240

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    リポジトリ公開URL: https://hdl.handle.net/2324/7172331

  • Bi/UiO-66-derived electrocatalysts for high CO2-to-formate conversion rate

    Takaoka, Y; Song, JT; Takagaki, A; Watanabe, M; Ishihara, T

    APPLIED CATALYSIS B-ENVIRONMENTAL   326   122400 - 122400   2023年6月   ISSN:0926-3373 eISSN:1873-3883

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Catalysis B: Environmental  

    In the CO2 electrocatalytic reduction reaction (CO2RR) technology, high CO2 conversion rate is highly required for efficient CO2 utilization from the CO2 resource. In this study, we propose the strategy of combining UiO-66 metal organic framework (MOF) structure with Bi electrocatalyst for highly active CO2RR with selective formic acid production. The synthesized Bi/UiO-66 catalyst shows superior CO2 reduction property, 4.6 times higher current density at −0.7 V vs. reversible hydrogen electrode (RHE) than bare Bi without UiO-66 despite of low electrochemical surface area. Also, NH2 functionalized UiO-66 shows almost no effect on CO2RR as compared to without NH2 probably due to disassembled linkers during CO2RR. Various characterizations such as Fourier transform infrared (FTIR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) indicate carbonate species captured form of CO2 at Zr-MOF site should contribute the high CO2 conversion rate. Our findings demonstrate the feasibility of Zr-MOF as a Supporting material to achieve efficient CO2 reduction.

    DOI: 10.1016/j.apcatb.2023.122400

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  • A comprehensive study on rational biocatalysts and individual components of photobiocatalytic H2 production systems

    Kosem, N; Watanabe, M; Song, JT; Takagaki, A; Ishihara, T

    APPLIED CATALYSIS A-GENERAL   651   2023年2月   ISSN:0926-860X eISSN:1873-3875

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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:Applied Catalysis A: General  

    Photobiocatalytic system has been developing as a promising approach for H2 production. Herein, the rational characteristics of biocatalysts and the role of individual components affecting the efficiency of the system were investigated. Photocatalytic studies showed that tris (2-amino-2-hydroxymethyl-1,3-propanediol) was an ideal electron donor for viologen reduction by TiO2. Biocatalytic reaction revealed that cell permeability, the redox potential of electron mediators and the cell envelope were crucial to the activity of whole-cell biocatalysts. In photobiocatalytic system, recombinant Escherichia coli with a turnover frequency of 39.43 ± 3.77 s−1 based on [FeFe]-hydrogenase activity was a more rational biocatalyst than Anabaena variabilis. A comprehensive study found that the presence of TiO2, light and biocatalysts strongly enhanced H2 production, whereas Tris and MV2+ had less influence. A maximum rate was found at 16.73 ± 1.03 μmol/min with a solar-to-H2 conversion of 1.58 ± 0.10 %. Understanding the role of each component will guide the development of high-efficient photobiocatalysis.

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  • A comprehensive study on the rational biocatalysts and individual components of photobiocatalytic H2 production system 査読 国際誌

    Nuttavut Kosem, Motonori Watanabe, Jun Tae Song, Atsushi Takagaki, Tatsumi Ishihara

    Applied Catalysis A: General   651   1190195   2023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)  

  • Pyridyl anchoring squaraine as a near-infrared dye sensitizer for effective sensitized hydrogen production over a titanium dioxide photocatalyst in water medium 招待 査読 国際誌

    Shen, XF; Watanabe, M; Takagaki, A; Song, JT; Abe, T; Kawaguchi, D; Tanaka, K; Ishihara, T

    APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING   129 ( 1 )   2023年1月   ISSN:0947-8396 eISSN:1432-0630

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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:Applied Physics A: Materials Science and Processing  

    Squaraine dyes are organic dyes having strong and narrow absorption properties in the near-infrared region that are widely used in photovoltaic and biomedical applications. In this work, squaraine dye (SA1) was synthesized as a dye sensitizer for a dye-sensitized photocatalytic system, which was composed of SA1 and Pt-loaded TiO2 powder photocatalyst (SA1/Pt-TiO2). The SA1/Pt-TiO2 system exhibited a good hydrogen production performance within 150 h and an apparent quantum yield of 1.4% under 800 nm monochromatic light irradiation. However, during the photocatalytic reaction, the photocatalytic activity of SA1/Pt-TiO2 decreased due to photodecomposition. Ultraviolet–visible absorption spectroscopy, 1H nuclear magnetic resonance spectroscopy, and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry measurements were performed to investigate the mechanism of the decomposition of the squaraine moiety of SA1, the decomposition process, and the structure of the decomposed material. The results show that even without the Pt-loaded TiO2 powder photocatalyst, SA1 undergoes photodissociation, which cleaves the bond between the indoline moiety and the square acid. Graphical abstract: [Figure not available: see fulltext.]

    DOI: 10.1007/s00339-022-06281-7

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    その他リンク: https://link.springer.com/article/10.1007/s00339-022-06281-7/fulltext.html

  • Introduction of tensile strain into titanium dioxide for increased solid acid catalytic activity

    Takagaki, A; Ozaki, T; Song, JT; Niwa, E; Watanabe, M; Ishihara, T

    CATALYSIS SCIENCE & TECHNOLOGY   12 ( 21 )   6359 - 6362   2022年10月   ISSN:2044-4753 eISSN:2044-4761

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Catalysis Science and Technology  

    Strained metal oxides are known to exhibit improved activity for redox and photocatalytic reactions. Here, we intentionally introduced tensile strain into rutile-type TiO2 by utilizing the difference in thermal expansion coefficients between TiO2 and Au and applied it as a solid acid catalyst. It was demonstrated that its acid catalytic activity in the acetalization of furfural was enhanced by increasing the degree of the strain introduced.

    DOI: 10.1039/d2cy00736c

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  • アルミナ担持白金触媒を用いたメタンと一酸化窒素によるシアン化水素合成における粒子径効果

    山﨑 達也, 高垣 敦, 宍戸 哲也, 阪東 恭子, 小平 哲也, 村上 純一, 丹羽 栄貴, 渡邊 源規, 石原 達己

    Journal of the Japan Petroleum Institute   65 ( 5 )   184 - 191   2022年9月   ISSN:13468804 eISSN:1349273X

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    記述言語:日本語   出版者・発行元:公益社団法人 石油学会  

    <p>白金担持アルミナ上で,一酸化窒素(NO)を酸化剤としてメタンをシアン化水素(HCN)に変換する際の白金ナノ粒子の粒径効果について検討した。担持量と焼成温度を制御することにより,1.6〜4.1 nmの範囲で様々な平均粒子径のPt触媒を得ることができた。Pt表面サイト量はパルス法によるCO滴定で決定し,触媒活性は同一接触時間下で評価した。Pt の粒子が小さい触媒(1.6〜3.2 nm)では,NO 転化率が粒子径の大きい触媒よりも低いことが分かった。粒子径の大きな触媒(4.1〜4.2 nm)は,10 wt% Pt/Al<sub>2</sub>O<sub>3</sub> において 400 ℃で 収率1.3 %(炭素ベース)で高い HCN 選択率(53.5 %)を示した。大きなPt粒子が高い活性を示す理由の一つは,金属と担体の界面で進行するHCNから二酸化炭素とアンモニアへの逐次反応を抑制したためと思われる。Pt L<sub>3</sub>端X線吸収微細構造(XAFS)スペクトルから,反応試験後の小粒子触媒はPt–CN種で覆われていることが分かった。一方,大粒子触媒ではPt–COが主な吸着種として観測され,大粒子触媒の方がHCN脱離が容易であることが示唆された。</p>

    DOI: 10.1627/jpi.65.184

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  • Sequential-infiltration of Ce and Ni in NiO-YSZ fuel electrode for tubular type solid oxide reversible cells (SORC) using LaGaO<sub>3</sub> electrolyte film 招待 査読 国際誌

    Ishihara, T; Tan, Z; Song, JT; Takagaki, A

    SOLID STATE IONICS   379   2022年6月   ISSN:0167-2738 eISSN:1872-7689

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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:Solid State Ionics  

    NiO-Y2O3 stabilized ZrO2 (YSZ) tubular type cell using La0.9Sr0.1Ga0.8Mg0.2O3−δ electrolyte film was prepared by dip-coating method. Effects of Ce infiltration or Ce, Ni sequential-infiltration into NiO-YSZ substrate were studied and it was found that Ce infiltration after Ni is highly effective for increasing the cell performance and the stability in fuel cell and electrolysis mode at 873 K in spite of decrease in performance by simple Ni infiltration. Cyclic operation of the fuel cell and electrolysis of LSGM tubular cell using Ce or Ce[sbnd]Ni sequential-infiltrated NiO-YSZ substrate was measured at 873 K using 17% steam-25%H2 in Ar as fuel. After 100 cycles at ±0.1 A cm−2, OCV was almost the same with the initial value. The terminal potential in SOFC operation became slightly lower with increasing cycle number in case of simple Ce infiltration. The main reason for degradation during cyclic performance seems to be assigned to the increased fuel electrode overpotential. However, degradation rate is much decreased by Ce[sbnd]Ni sequential-infiltration.

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  • Mixing nitrogen-containing compounds for synthesis of porous boron nitride for improved porosity, surface functionality, and solid base catalytic activity 査読 国際誌

    Takagaki, A; Nakamura, S; Ashimura, S; Yoshida, M; Song, JT; Watanabe, M; Hayashi, S; Ishihara, T

    APPLIED CATALYSIS A-GENERAL   638   118635 - 118635   2022年5月   ISSN:0926-860X eISSN:1873-3875

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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:Applied Catalysis A: General  

    Porous boron nitride was synthesized using boric acid with urea and/or hexamethylenetetramine (HMTA) via pyrolysis method. X-ray diffraction and Fourier transform infrared measurements indicated that the synthesized boron nitride has a turbostratic structure with both amino and hydroxyl group on the surface. The synthesis using a mixture of two nitrogen-containing precursors was found to not only significantly increase the porosity, but also improve the surface functionality. X-ray photoelectron spectroscopy and B K-edge and O K-edge X-ray absorption fine structure measurements revealed that the proportion of amino and hydroxyl groups on the surface increased with increasing concentration of HMTA during synthesis. Solid-state 11B nuclear magnetic resonance spectroscopy indicated that all samples contained trigonal B-N, trigonal B-O and tetrahedral B-O sites, and that samples prepared with high concentrations of HMTA had less tetrahedral B-O sites, suppressing the formation of BOx species as byproducts. Solid base catalytic activity was evaluated through Knoevenagel condensation, and the catalytic performance was significantly improved by synthesizing boron nitride catalyst using a mixture of the two nitrogen-containing precursors. The enhancement of the activity was influenced by the development of the pore structure as well as the emergence of functional groups on the surface.

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  • Sillén–Aurivillius phase bismuth niobium oxychloride, Bi4NbO8Cl, as a new oxide-ion conductor 査読 国際誌

    Kluczny, M; Song, JT; Akbay, T; Niwa, E; Takagaki, A; Ishihara, T

    JOURNAL OF MATERIALS CHEMISTRY A   10 ( 5 )   2550 - 2558   2022年3月   ISSN:2050-7488 eISSN:2050-7496

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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:Journal of Materials Chemistry A  

    Sillén-Aurivillius phase Bi4NbO8Cl consists of Bi2O2+/NbO3-/Bi2O2+/Cl- layers and oxide-ion conduction is expected to occur in its Bi2O2+ layer. Here, we report the influence of partial substitutions of Bi with Ca2+, Sr2+, Ba2+, La3+, Ga3+ and Sn4+ on the electrical properties. It was found that substitution with low valence cations is effective for increasing electrical conductivity, and in particular, Sr2+ substitution is the most effective for this purpose. The dependence of electrical conductivity on the oxygen partial pressure of a Sr-doped sample is quite low (PO2-0.015) and the optimized amount of Sr doping is x = 0.1 in Bi4-xSrxNbO8-δCl. The electromotive force of N2/O2 gas concentration cell is 90% of the theoretical value and the tracer diffusion constant (D) estimated by 18O2 diffusion almost corresponds with that estimated from conductivity. Considering the activation energy of the D value, oxide-ion conductivity in Sillén-Aurivillius phase Bi4NbO8Cl mainly occurs along the Bi2O22+ layer, which indicates that Bi4NbO8Cl is a new family of fast oxide-ion conductors. This journal is

    DOI: 10.1039/d1ta07335d

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  • Back-channel etched In-Ga-Zn-O Thin-film Transistor utilizing Selective Wet-Etching of Copper Source and Drain 査読 国際誌

    Rauf Khan, Muhamad Affiq Bin Misran, Michitaka Ohtaki, Jun Tae Song, Tatsumi Ishihara, Reiji Hattori

    Processes   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)  

  • Synthetic multiscale design of nanostructured Ni single atom catalyst for superior CO2 electroreduction

    Gyoung Hwa Jeong, Ying Chuan Tan, Jun Tae Song, Gil-Yong Lee, Ho Jin Lee, Jaewoong Lim, Hu Young Jeong, Somi Won, Jihun Oh, Sang Ouk Kim

    Chemical Engineering Journal   426   131063 - 131063   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: 10.1016/j.cej.2021.131063

  • PrBaCo2O5+δ-Sm0.5Sr0.5CoO3 Composite Oxide as Active Cathode for Intermediate-Temperature Solid Oxide Fuel Cells 査読 国際誌

    103   1425   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)  

  • Ruthenium(iv) N-confused porphyrin μ-oxo-bridged dimers: acid-responsive molecular rotors 査読 国際誌

    11   24575   2021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)  

  • Tensile strain for band engineering of SrTiO3 for increasing photocatalytic activity to water splitting

    Yoonyoung Kim, Motonori Watanabe, Junko Matsuda, Jun Tae Song, Atsushi Takagaki, Aleksandar Staykov, Tatsumi Ishihara

    APPLIED CATALYSIS B-ENVIRONMENTAL   278   2020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: 10.1016/j.apcatb.2020.119292

  • Enhancement of solid base activity for porous boron nitride catalysts by controlling active structure using post treatment

    Atsushi Takagaki, Shohei Nakamura, Motonori Watanabe, Yoonyoung Kim, Jun Tae Song, Keiko Jimura, Kanta Yamada, Masaaki Yoshida, Shigenobu Hayashi, Tatsumi Ishihara

    Applied Catalysis A: General   608   117843 - 117843   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)  

    DOI: 10.1016/j.apcata.2020.117843

  • Activation of C2H4 reaction pathways in electrochemical CO2 reduction under low CO2 partial pressure 査読

    Hakhyeon Song, Jun Tae Song, Beomil Kim, Ying Chuan Tan, Jihun Oh

    APPLIED CATALYSIS B-ENVIRONMENTAL   272   2020年9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.2020.119049

  • Facile electrochemical synthesis of dilute AuCu alloy nanostructures for selective and long-term stable CO2 electrolysis 査読

    Jaehoon Kim, Jun Tae Song, Jihun Oh

    JOURNAL OF CHEMICAL PHYSICS   153 ( 5 )   2020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: 10.1063/5.0009340

  • Synthesis of a Nickel Single-Atom Catalyst Based on Ni–N4–xCx Active Sites for Highly Efficient CO2 Reduction Utilizing a Gas Diffusion Electrode 査読

    3   8739   2020年8月

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  • Scandium and copper co-doping effect on stability and activity to the NO direct decomposition of Ba3Y4O9 査読

    Siman Fang, Atsushi Takagaki, Motonori Watanabe, Jun Tae Song, Tatsumi Ishihara

    APPLIED CATALYSIS A-GENERAL   602   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.apcata.2020.117743

  • Pyridyl-Anchored Type BODIPY Sensitizer-TiO2 Photocatalyst for Enhanced Visible Light-Driven Photocatalytic Hydrogen Production 査読

    Xiao-Feng Shen, Motonori Watanabe, Atsushi Takagaki, Jun Tae Song, Tatsumi Ishihara

    CATALYSTS   10 ( 5 )   2020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: 10.3390/catal10050535

  • Energy-resolved distribution of electron traps for O/S-doped carbon nitrides by reversed double-beam photoacoustic spectroscopy and the photocatalytic reduction of Cr(vi) 査読

    Chitiphon Chuaicham, Sekar Karthikeyan, Radheshyam R. Pawar, Yihuang Xiong, Ismaila Dabo, Bunsho Ohtani, Yoonyoung Kim, Jun Tae Song, Tatsumi Ishihara, Keiko Sasaki

    CHEMICAL COMMUNICATIONS   56 ( 26 )   3793 - 3796   2020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: 10.1039/c9cc09988c

  • Hierarchically porous Au nanostructures with interconnected channels for efficient mass transport in electrocatalytic CO2 reduction 査読

    Gayea Hyun, Jun Tae Song, Changui Ahn, Youngjin Ham, Donghwi Cho, Jihun Oh, Seokwoo Jeon

    PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA   117 ( 11 )   5680 - 5685   2020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: 10.1073/pnas.1918837117

  • Over a 15.9% Solar-to-CO Conversion from Dilute CO2 Streams Catalyzed by Gold Nanoclusters Exhibiting a High CO2 Binding Affinity 査読

    Beomil Kim, Hoeun Seong, Jun Tae Song, Kyuju Kwak, Hakhyeon Song, Ying Chuan Tan, Gibeom Park, Dongil Lee, Jihun Oh

    ACS ENERGY LETTERS   5 ( 3 )   749 - 757   2020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/acsenergylett.9b02511

  • Importance of ZnTiO3 Phase in ZnTi-Mixed Metal Oxide Photocatalysts Derived from Layered Double Hydroxide 査読

    Chitiphon Chuaicham, Sekar Karthikeyan, Jun Tae Song, Tatsumi Ishihara, Bunsho Ohtani, Keiko Sasaki

    ACS APPLIED MATERIALS & INTERFACES   12 ( 8 )   9169 - 9180   2020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/acsami.9b18785

  • Towards Higher Rate Electrochemical CO2 Conversion: From Liquid-Phase to Gas-Phase Systems 査読

    Jun Tae Song, Hakhyeon Song, Beomil Kim, Jihun Oh

    CATALYSTS   9 ( 3 )   2019年3月

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    記述言語:英語  

    DOI: 10.3390/catal9030224

  • High-Pressure Evaporation-Based Nanoporous Black Sn for Enhanced Performance of Lithium-Ion Battery Anodes 査読

    Sangwoo Ryu, Hyung Cheoul Shim, Jun Tae Song, Ilhwan Kim, Hyewon Ryoo, Seungmin Hyun, Jihun Oh

    PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION   36 ( 1 )   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: 10.1002/ppsc.201800331

  • Hole-Selective CoOx/SiOx/Si Heterojunctions for Photoelectrochemical Water Splitting 査読

    Seungtaeg Oh, Soonyoung Jung, Yong Hwan Lee, Jun Tae Song, Tae Hyun Kim, Dip K. Nandi, Soo-Hyun Kim, Jihun Oh

    ACS CATALYSIS   8 ( 10 )   9755 - 9764   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)  

    DOI: 10.1021/acscatal.8b03520

  • Effect of mass transfer and kinetics in ordered Cu-mesostructures for electrochemical CO2 reduction 査読

    Hakhyeon Song, Mintaek Im, Jun Tae Song, Jung-Ae Lim, Beom-Sik Kim, Youngkook Kwon, Sangwoo Ryu, Jihun Oh

    APPLIED CATALYSIS B-ENVIRONMENTAL   232   391 - 396   2018年9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.2018.03.071

  • Morphology-controlled Au nanostructures for efficient and selective electrochemical CO2 reduction 査読

    Jaehoon Kim, Jun Tae Song, Hyewon Ryoo, Jin-Gyu Kim, Sung-Yoon Chung, Jihun Oh

    JOURNAL OF MATERIALS CHEMISTRY A   6 ( 12 )   5119 - 5128   2018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: 10.1039/c8ta01010b

  • Enhanced catalytic activity for CO oxidation by the metal-oxide perimeter of TiO2/nanostructured Au inverse catalysts 査読

    Si Woo Lee, Jun Tae Song, Jaehoon Kim, Jihun Oh, Jeong Young Park

    NANOSCALE   10 ( 8 )   3911 - 3917   2018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/c7nr08168e

  • The Role of Adsorbed CN and CI on an Au Electrode for Electrochemical CO2 Reduction 査読

    Minhyung Cho, Jun Tae Song, Seoin Back, Yousung Jung, Jihun Oh

    ACS CATALYSIS   8 ( 2 )   1178 - 1185   2018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/acscatal.7b03449

  • Silver Nanowire/Carbon Sheet Composites for Electrochemical Syngas Generation with Tunable H-2/CO Ratios 査読

    Minhyung Cho, Ji-Won Seo, Jun Tae Song, Jung-Yong Lee, Jihun Oh

    ACS OMEGA   2 ( 7 )   3441 - 3446   2017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/acsomega.7b00846

  • Atomic layer deposited molybdenum disulfide on Si photocathodes for highly efficient photoelectrochemical water reduction reaction 査読

    Seungtaeg Oh, Jun Beom Kim, Jun Tae Song, Jihun Oh, Soo-Hyun Kim

    JOURNAL OF MATERIALS CHEMISTRY A   5 ( 7 )   3304 - 3310   2017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/c6ta10707a

  • Nanoporous Au Thin Films on Si Photoelectrodes for Selective and Efficient Photoelectrochemical CO2 Reduction 査読

    Jun Tae Song, Hyewon Ryoo, Minhyung Cho, Jaehoon Kim, Jin-Gyu Kim, Sung-Yoon Chung, Jihun Oh

    ADVANCED ENERGY MATERIALS   7 ( 3 )   2017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: 10.1002/aenm.201601103

  • Interfacial band-edge engineered TiO2 protection layer on Cu2O photocathodes for efficient water reduction reaction 査読

    Jaesuk Choi, Jun Tae Song, Ho Seong Jang, Min-Jae Choi, Dong Min Sim, Soonmin Yim, Hunhee Lim, Yeon Sik Jung, Jihun Oh

    ELECTRONIC MATERIALS LETTERS   13 ( 1 )   57 - 65   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: 10.1007/s13391-017-6316-1

  • Photoelectrochemical CO2 reduction on 3C-SiC photoanode in aqueous solution 査読

    Jun Tae Song, Takayuki Iwasaki, Mutsuko Hatano

    JAPANESE JOURNAL OF APPLIED PHYSICS   54 ( 4 )   2015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: 10.7567/JJAP.54.04DR05

  • Pt co-catalyst effect on photoelectrochemical properties of 3C-SiC photo-anode 査読

    Jun Tae Song, Takayuki Iwasaki, Mutsuko Hatano

    JAPANESE JOURNAL OF APPLIED PHYSICS   53 ( 5 )   2014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: 10.7567/JJAP.53.05FZ04

  • Improved visible light driven photoelectrochemical properties of 3C-SiC semiconductor with Pt nanoparticles for hydrogen generation 査読

    Jun Tae Song, Hisanori Mashiko, Masayuki Kamiya, Yoshifumi Nakamine, Akira Ohtomo, Takayuki Iwasaki, Mutsuko Hatano

    APPLIED PHYSICS LETTERS   103 ( 21 )   2013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: 10.1063/1.4832333

  • Square-Patterned Narrow-Band Infrared Emitter for Filter Less Infrared Gas Sensor 査読

    Jun Tae Song, Joong Hee Park, June Kyoo Lee, Ju Chan Choi, Seong Ho Kong

    JAPANESE JOURNAL OF APPLIED PHYSICS   51 ( 6 )   2012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: 10.1143/JJAP.51.06FL18

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講演・口頭発表等

  • The effect of Zr on Bi electrocatalyst for enhancing CO2 conversion to formic acid

    @Jun Tae Song,#Yuta Takaoka, @Motonori Watanabe, @Tatsumi Ishihara

    2024年3月 

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    開催年月日: 2024年4月

    記述言語:日本語   会議種別:口頭発表(一般)  

    国名:日本国  

  • Synergistic Integration of Zr-MOF (UiO-66) and Bi Electrocatalysts for Enhanced CO2 Conversion to Formate 国際会議

    @Jun Tae Song, #Yuta Takaoka, @Atsushi Takagaki, @Motonori Watanabe, @Tatsumi Ishihara

    244th ECS meeting  2024年10月 

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    開催年月日: 2024年4月

    記述言語:英語   会議種別:口頭発表(一般)  

    国名:スウェーデン王国  

  • The effect of Zr on Bi electrocatalyst for enhancing CO2 conversion to formic acid 招待 国際会議

    @Jun Tae Song,#Yuta Takaoka, @Atsushi Takagaki, @Motonori Watanabe, @Tatsumi Ishihara

    NTU-KU Joint Symposium  2023年12月 

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    開催年月日: 2024年4月

    記述言語:英語   会議種別:口頭発表(一般)  

    国名:台湾  

  • Bi/UiO-66を前駆体とした電極触媒を用いたCO2電解によるギ酸生成

    #髙岡祐太、@Song Jun Tae、@渡邊 源規、@高垣 敦、@石原 達己

    2022電気化学会秋季大会  2022年9月 

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    開催年月日: 2023年6月

    記述言語:日本語   会議種別:口頭発表(一般)  

    開催地:神奈川大学   国名:日本国  

  • Boosting CO2 conversion rate via Bi/UiO-66-derived electrocatalysts 国際会議

    #Yuta Takaoka, @Jun Tae Song, @Motonori Watanabe, @Atsushi Takagaki, @Tatsumi Ishihara

    19th Korea-Japan Symposium on Catalysis (KJSC)  2023年5月 

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    開催年月日: 2023年5月

    記述言語:英語   会議種別:口頭発表(一般)  

    国名:大韓民国  

  • The effect of Zr hydroxide on Bi electrocatalysts for CO2 conversion to formate 国際会議

    @Jun Tae Song, #Yuta Takaoka, @Motonori Watanabe, @Atsushi Takagaki, @Tatsumi Ishihara

    19th Korea-Japan Symposium on Catalysis (KJSC)  2023年5月 

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    開催年月日: 2023年5月

    記述言語:英語   会議種別:口頭発表(一般)  

    国名:大韓民国  

  • Bi担持UiO-66を用いる電気化学的CO2還元反応によるギ酸合成

    #髙岡 祐太, @Song Jun Tae, @渡邊 源規, @高垣 敦, @石原 達己

    電気化学会  2022年3月 

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    開催年月日: 2022年6月

    記述言語:日本語   会議種別:口頭発表(一般)  

    開催地:オンライン   国名:日本国  

  • Bi担持MOFを用いた二酸化炭素還元反応によるギ酸合成

    #髙岡 祐太, @Song Jun Tae, @高垣 敦, @渡邊 源規, @石原 達己

    触媒討論会  2022年3月 

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    開催年月日: 2022年6月

    記述言語:日本語  

    開催地:オンライン   国名:日本国  

  • Nanostructured Electrocatalysts for Electrochemical CO2 Conversion 招待 国際会議

    Jun Tae Song

    SNU-KYUSHU Joint Symposium  2021年6月 

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    開催年月日: 2021年6月

    記述言語:英語   会議種別:シンポジウム・ワークショップ パネル(公募)  

    国名:大韓民国  

  • Electrochemical CO2 conversion with Au nanostructures

    Jun Tae Song

    MPD &EEC Joint Retreat 2020  2020年2月 

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    記述言語:英語  

    国名:日本国  

  • Facile Electrochemical Strategy for Au Nanostructure Catalysts for Electroreduction of CO2

    Jun Tae Song, Jihun Oh

    2019年11月 

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    記述言語:日本語  

    国名:日本国  

▼全件表示

産業財産権

特許権   出願件数: 1件   登録件数: 0件
実用新案権   出願件数: 0件   登録件数: 0件
意匠権   出願件数: 0件   登録件数: 0件
商標権   出願件数: 0件   登録件数: 0件

所属学協会

  • 電気化学会

  • 触媒学会

学術貢献活動

  • 学術論文等の審査

    役割:査読

    2023年

     詳細を見る

    種別:査読等 

    外国語雑誌 査読論文数:7

  • 学術論文等の審査

    役割:査読

    2022年

     詳細を見る

    種別:査読等 

    外国語雑誌 査読論文数:1

  • 学術論文等の審査

    役割:査読

    2021年

     詳細を見る

    種別:査読等 

    外国語雑誌 査読論文数:3

  • 学術論文等の審査

    役割:査読

    2020年

     詳細を見る

    種別:査読等 

    外国語雑誌 査読論文数:8

共同研究・競争的資金等の研究課題

  • 三重項状態利用を増進する広帯領域増感色素の開拓と光電気水分解デバイスへの応用

    研究課題/領域番号:24H00486  2024年4月 - 2028年3月

    科学研究費助成事業  基盤研究(A)

    渡邊 源規, Song Juntae, 松島 敏則

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    資金種別:科研費

    本研究は従来のスピン軌道相互作用により生成した三重項状態を触媒利用する分子に、禁制遷移によって基底状態から直接三重項を利用する発色団を組み込み、三重項状態利用確率を増進させる。本色素を無機触媒に増感色素として組み込み、色素の可視‐近赤外光領域において幅広く増感する、光電極を開発する。三重項状態は酸素で失活するため、光電極に本色素を組み込み触媒的酸素発生サイトと三重項状態を隔絶することで克服する。

    CiNii Research

  • CO2からマルチカーボン化合物合成に向けた革新的Ni-Carbon電気触媒構造の開発

    研究課題/領域番号:24K08580  2024年 - 2026年

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    Song Juntae

      詳細を見る

    担当区分:研究代表者  資金種別:科研費

    本研究では安価なNi触媒を用いて, より低い過電圧で選択的にマルチカーボン物質を生成する革新的な電極構造の開発を目指す. 具体的にはNi-NCサイトとNi-Oサイトの総合作用を制御できる電極構造を設計する. また, 安定性向上やメカニズムの糾明にも取り組む予定である. これによって現在6.5%程度のマルチカーボン生成の効率をC-C couplingが起こるNiサイトの条件を明らかにでき, マルチカーボン生成技術に大きく寄与することが期待される.

    CiNii Research

  • 高効率な太陽光水分解に向けたタンデム構造光電極デバイスの開発

    2023年

    科学研究費助成事業  西部ガス助成金

      詳細を見る

    担当区分:研究代表者  資金種別:科研費以外の競争的資金

  • バイオ無機光触媒による革新的な高効率物質変換

    研究課題/領域番号:21K18213  2021年7月 - 2024年3月

    科学研究費助成事業  挑戦的研究(開拓)

    石原 達己, Song Juntae

      詳細を見る

    資金種別:科研費

    太陽光は、無限といってよいエネルギーで、効率よく、水素や有用な化合物へ直接変換できる触媒プロセスは、永続的な人類の発展という観点で、重要である。本研究では直接光エネルギーを化学エネルギーに変換可能という観点から、光触媒に着目し、新しいバイオ光触媒というコンセプトの創出を行う。本研究では、従来の無機光触媒ではバイオ触媒との複合は、バイオ触媒の寿命の観点から不可能と考えられてきた常識に挑戦し、酸化還元対で電荷を伝達することで、酵素を光触媒と組み合わせて、従来は進まないと考えられている多電子系の反応を行うことのできる新規なバイオ光触媒という概念を創出し、新しい学術領域に挑戦する。

    CiNii Research

  • Systematic heterogeneous design of Cu catalysts for CO2 electroreduction towards highly value-added products

    研究課題/領域番号:21K14721  2021年 - 2023年

    日本学術振興会  科学研究費助成事業  若手研究

    Song Juntae

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    担当区分:研究代表者  資金種別:科研費

    This work target to systematically design heterogeneous Cu-based catalysts for electrochemical CO2 reduction to value-added products. We propose novel structure of catalytic materials with highly porous materials and Cu metal catalysts for facile CO2 activation and improved C-C coupling.

    CiNii Research

  • Bio-inorganic hybrid photoelectrochemical system for highly efficient water-splitting

    2021年 - 2022年

      詳細を見る

    担当区分:研究代表者  資金種別:学内資金・基金等

  • Discovering Inexpensive, Effective Novel Catalysts for Electrochemical CO2 Conversion: Towards Value-Added Chemical Production

    研究課題/領域番号:21  2020年 - 2022年

    Grants-in-Aid for Scientific Research 

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    担当区分:研究代表者  資金種別:科研費以外の競争的資金

  • The development of highly porous and visible-light absorbing photoelectrode for photoelectrochemical water-splitting

    2020年 - 2021年

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    担当区分:研究代表者  資金種別:学内資金・基金等

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教育活動概要

  • 応用化学の実験教育を担当

担当授業科目

  • 物質科学工学実験第1

    2022年10月 - 2023年3月   後期

  • 専門英語

    2022年10月 - 2023年3月   後期

  • 物質科学工学実験第3

    2022年10月 - 2023年3月   後期

  • Experiment in Applied Chemistry I

    2022年10月 - 2022年12月   秋学期

  • Experiment in Applied Chemistry II

    2022年4月 - 2022年6月   春学期

  • 物質科学工学実験第1

    2021年10月 - 2022年3月   後期

  • 専門英語

    2021年10月 - 2022年3月   後期

  • 物質科学工学実験第3

    2021年10月 - 2022年3月   後期

  • Experiment in Applied Chemistry I

    2021年10月 - 2021年12月   秋学期

  • Experiment in Applied Chemistry II

    2021年4月 - 2021年6月   春学期

  • 物質科学工学実験第1

    2020年10月 - 2021年3月   後期

  • 専門英語

    2020年10月 - 2021年3月   後期

  • 物質科学工学実験第3

    2020年10月 - 2021年3月   後期

  • Experiment in Applied Chemistry I

    2020年10月 - 2020年12月   秋学期

  • Experiment in Applied Chemistry II

    2020年4月 - 2020年6月   春学期

  • 物質科学工学実験第3

    2019年12月 - 2020年2月   冬学期

  • 専門英語

    2019年10月 - 2020年3月   後期

  • 物質科学工学実験第1

    2019年10月 - 2019年12月   秋学期

  • Experiment in Applied Chesmitry I

    2019年10月 - 2019年12月   秋学期

▼全件表示

学内運営に関わる各種委員・役職等

  • 2024年4月 - 2025年3月   研究所 アイスナー安全・衛生部会委員

  • 2022年4月 - 2024年3月   研究所 アイスナー安全・衛生部会委員

  • 2020年2月 - 2022年3月   研究所 アイスナー安全・衛生部会委員