Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
Akari Hayashi Last modified date:2021.06.11

Professor / Department of Hydrogen Energy Systems, Hydrogen Utilization Engineering / Kyushu University Platform of Inter/Transdisciplinary Energy Research


Papers
1. Byungchan Hwang, Shoichi Kondo, Takamasa Kikuchi, Kazunari Sasaki, Akari Hayashi, Masamichi Nishihara, Silicone-containing polymer blend electrolyte membranes for fuel cell applications, Journal of Applied Polymer Science, 10.1002/app.50 328, 138, 18, 2021.05.
2. Ting-Wei Huang, Mayumi Nagayama, Junko Matsuda, Kazunari Sasaki, Akari Hayashi, Mesoporous Carbon Fibers with Tunable Mesoporosity for Electrode Materials in Energy Devices, Molecules, 10.3390/molecules26030724, 26, 3, 724, 2021.01.
3. Yusuke Honsho, Mayumi Nagayama, Kazunari Sasaki, Akari Hayashi, Durability analysis on PEM water electrolyzers against the voltage fluctuation of wind power, ECS Trans., 10.1149/09809.0687ecst, 98, 9, 687-698, 2020.10.
4. Tetsuya Tonosako, Zhiyun Noda, Junko Matsuda, Akari Hayashi, Kazunari Sasaki, Pt-TiO2 nanocomposite PEFC electrocatalysts for high potential cycle durability, ECS Trans., 10.1149/09809.0523ecst, 98, 9, 523-533, 2020.10.
5. Tsubasa Yoshizumi, Masaru Nagamine, Zhiyun Noda, Junko Matsuda, Akari Hayashi, Kazunari Sasaki, Nanostructuring Pt electrocatalysts supported on nanocrystalline SnO2 for polymer electrolyte fuel cells, ECS Trans., 10.1149/09809.0517ecst, 98, 9, 517-522, 2020.10.
6. Teppei Ikehara, Zhiyun Noda, Junko Matsuda, Masamichi Nishihara, Akari Hayashi, Kazunari Sasaki, Porous metal support for gas diffusion electrode of PEFCs, ECS Trans., 10.1149/1945-7111/abb37d, 98, 9, 573-582, 2020.10.
7. Masahiro Yasutake, Daiki Kawachino, Zhiyun Noda, Junko Matsuda, Stephen M. Lyth, Kohei Ito, Akari Hayashi, Kazunari Sasaki, Catalyst-Integrated Gas Diffusion Electrodes for Polymer Electrolyte Membrane Water Electrolysis: Porous Titanium Sheets with Nanostructured TiO2 Surfaces Decorated with Ir Electrocatalysts, Journal of the Electrochemical Society, 10.1149/1945-7111/abb37d, 167, 12, 124523-124523, 2020.09.
8. D. Kawachino, M. Yasutake, Z. Noda, Junko Matsuda, Stephen Matthew Lyth, Akari Hayashi, K. Sasaki, Surface-Modified Titanium Fibers as Durable Carbon-Free Platinum Catalyst Supports for Polymer Electrolyte Fuel Cells, Journal of the Electrochemical Society, 10.1149/1945-7111/ab9cd4, 167, 10, 2020.01, Carbon-based electrodes in polymer electrolyte fuel cells (PEFCs) are prone to corrosion. Therefore, alternative "carbon-free"materials are required. Here, the use of a catalyst-coated porous metal support is proposed as a gas diffusion electrode. As a proof-of-concept, commercially available porous titanium sheets comprising sintered titanium fibers are chemically etched with NaOH, followed by heat treatment. This results in the formation of oxidized titanium nanostructures (such as nanosheets and nanotubes) at the surface. Subsequently, platinum decoration is performed via arc plasma deposition (APD). This porous composite structure is then attached to the membrane, and used as the gas diffusion electrode for PEFC membrane electrode assemblies (MEAs). This concept integrates the catalyst, catalyst support, gas diffusion layer, and current collector in a single structure, cutting down on the number of cell components and reducing total device thickness. The carbon-free nature of this integrated gas diffusion electrode is demonstrated to successfully avoid carbon corrosion during start-stop potential cycling over 60,000 potential cycles. However, further improvements in initial electrochemical activity are still required..
9. S. Takei, K. Uda, M. Nagayama, Kazunari Sasaki, A. Hayashi, Investigation of Reducing Concentration Overvoltage toward Development of Low Pt-Loading PEFC, Journal of the Electrochemical Society, 10.1149/1945-7111/abac28, 167, 12, 2020.01, Membrane electrode assemblies (MEAs) with various catalyst-loading were made using a standard 46.5%Pt/KB (TEC10E50E) with the aim of developing low Pt-loading PEFCs. Since increase in concentration overvoltage for low catalyst-loading MEAs was observed, the mechanism of such increase in concentration overvoltage was considered, and then reducing concentration overvoltage was tried through two methods, by adding extra carbon and using a more hydrophobic carbon support, graphitized Ketjen black, within the cathode layer (CL). As a result, we have experimentally proven that increase in hydrophobicity of CL can promote water drain and reduce the concentration overvoltage for low catalyst-loading MEAs, and hydrophobicity is an important factor to be controlled within CL in addition to porosity..
10. Marika Muto, Mayumi Nagayama, Kazunari Sasaki, Akari Hayashi, Development of porous Pt electrocatalysts for oxygen reduction and evolution reactions, Molecules, 10.3390/molecules25102398, 25, 10, 2020.05, Porous Pt electrocatalysts have been developed as an example of carbon-free porous metal catalysts in anticipation of polymer electrolyte membrane (PEM) fuel cells and PEM water electrolyzers through the assembly of the metal precursor and surfactant. In this study, porous Pt was structurally evaluated and found to have a porous structure composed of connected Pt particles. The resulting specific electrochemical surface area (ECSA) of porous Pt was 12.4 m2 g−1, which was higher than that of commercially available Pt black. Accordingly, porous Pt showed higher oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activity than Pt black. When the activity was compared to that of a common carbon-supported electrocatalyst, Pt/ketjen black (KB), porous Pt showed a comparable ORR current density (2.5 mA cm−2 at 0.9 V for Pt/KB and 2.1 mA cm−2 at 0.9 V for porous Pt), and OER current density (6.8 mA cm−2 at 1.8 V for Pt/KB and 7.0 mA cm−1 at 1.8 V), even though the ECSA of porous Pt was only one-sixth that of Pt/KB. Moreover, it exhibited a higher durability against 1.8 V. In addition, when catalyst layers were spray-printed on the Nafion® membrane, porous Pt displayed more uniform layers in comparison to Pt black, showing an advantage in its usage as a thin layer..
11. Albert Mufundirwa,George F Harrington,Mohammed S Ismail,Břetislav Šmid,Benjamin V Cunning,Yu Shundo,Mohamed Pourkashanian,Kazunari Sasaki,Akari Hayashi,Stephen M Lyth, Gram-scale Synthesis of Alkoxide-Derived Nitrogen-Doped Carbon Foam as a Support for Fe-N-C Electrocatalysts, Nanotechnology, 10.1088/1361-6528/ab76ed, 29;31, 22, 225401, 2020.02.
12. Hiromichi Manabe, Yoshiki Nakazato, Makito Okumura, Zhiyun Noda, Junko Matsuda, Akari Hayashi, Kazunari Sasaki, General Procedure for 3-Dimensional Nanostructure Analysis of PEFC Electrocatalyst Layers, ECS Trans., 10.1149/09208.0189ecst, 92, 8, 189-196, 2019.07.
13. Tetsuya Tonosako, Daiki Kawachino, Zhiyun Noda, Junko Matsuda, Akari Hayashi, Kazunari Sasaki, Preparation and Electrochemical Activities of Pt-TiO2 Nanocomposite Electrocatalysts for PEFCs, ECS Trans., 10.1149/09208.0493ecst, 92, 8, 493-506, 2019.07.
14. Tsubasa Yoshizumi, Masaru Nagamine, Zhiyun Noda, Junko Matsuda, Akari Hayashi, Kazunari Sasaki, Electrocatalysts Supported on Nanocrystalline SnO2 for Polymer Electrolyte Fuel Cells, ECS Trans., 10.1149/09208.0479ecst, 92, 8, 479-484, 2019.07.
15. Shota Takei, Keisuke Uda, Mayumi Nagayama, Kazunari Sasaki, Akari Hayashi, Investigation of Concentration Overvoltage Increase in Low Pt-Loading PEFC, ECS Trans., 10.1149/09208.0293ecst, 92, 8, 293-304, 2019.07.
16. Ting-Wei Huang, Mayumi Nagayama, Kazunari Sasaki, Akari Hayashi, Development of Mesoporous Carbon Fibers for PEFC Catalyst Supports, ECS Trans., 10.1149/09208.0571ecst, 92, 8, 571-578, 2019.07.
17. Hirotoshi Odoi, Daiki Kawachino, Zhiyun Noda, Junko Matsuda, Akari Hayashi, Kazunari Sasaki, MPL/GDL-Supported Pt Electrocatalysts for PEFCs, ECS Trans., 10.1149/09208.0507ecst, 92, 8, 507-514, 2019.07.
18. Taichi Matoba, Hidemasa Miyamoto, Mayumi Nagayama, Kazunari Sasaki, Akari Hayashi, Dependence of Proton Conductivity on Cathode Degradation in PEFC, ECS Trans., 10.1149/09208.0305ecst, 92, 8, 305-316, 2019.07.
19. Masahiro Yasutake, Daiki Kawachino, Zhiyun Noda, Junko Matsuda, Kohei Ito, Akari Hayashi, Kazunari Sasak, GDL-Integrated Electrodes with Ir-Based Electrocatalysts for Polymer Electrolyte Membrane Water Electrolysis, ECS Trans., 10.1149/09208.0833ecst, 92, 8, 833-843, 2019.07.
20. S. Matsumoto, M. Nagamine, Z. Noda, J. Matsuda, S. M. Lyth, A. Hayashi, and K. Sasaki, PEFC Electrocatalysts Supported on Nb-SnO2 for MEAs with High Activity and Durability: Part II. Application of Bimetallic Pt-Alloy Catalysts
Fuel Cells, Electrolyzers, and Energy Conversion, J. Electrochem. Soc, 10.1149/2.0321814jes, 165, 14, F1164-F1175, 2018.10.
21. Y. Nakazato, D. Kawachino, Z. Noda, J. Matsuda, S. M. Lyth, A. Hayashi, and K. Sasaki, PEFC Electrocatalysts Supported on Nb-SnO2 for MEAs with High Activity and Durability: Part I. Application of Different Carbon Fillers
Fuel Cells, Electrolyzers, and Energy Conversion, J. Electrochem. Soc., 10.1149/2.0311814jes, 165, 14, F1154-F1163, 2018.10.
22. Marika Muto, Mayumi Nagayama, Kazunari Sasaki, and Akari Hayashi, Development and Evaluation of Ir Based Anode Electrocatalysts for Water Electrolysis, ECS Trans., 10.1149/08613.0719ecst, 86, 13, 719-726, 2018.09.
23. Masahiro Yasutake, Hiroki Anai, Daiki Kawachino, Zhiyun Noda, Junko Matsuda, Kohei Ito, Akari Hayashi, and Kazunari Sasak, Select this article Metal-Oxide-Supported Ir-Decorated Electrocatalysts for Polymer Electrolyte Membrane Water Electrolysis , ECS Trans., 10.1149/08613.0673ecst, 86, 13, 673-682, 2018.09.
24. Daiki Kawachino, Masahiro Yasutake, Hirotoshi Odoi, Zhiyun Noda, Junko Matsuda, Akari Hayashi, and Kazunari Sasaki , Carbon-Free All-in-One Electrode Using Porous Ti Sheet for PEFCs , ECS Trans., 10.1149/08613.0541ecst, 86, 13, 541-547, 2018.09.
25. Masaru Nagamine, Zhiyun Noda, Hiromichi Manabe, Junko Matsuda, Akari Hayashi, and Kazunari Sasaki, Oxide-Core Pt-Shell Electrocatalysts for PEFCs: Photochemical Preparation Using SnO2 Nanoparticles, ECS Trans., 10.1149/08613.0531ecst, 86, 13, 531-540, 2018.09.
26. Keisuke Uda, Zhiyun Noda, Mayumi Nagayama, Kazunari Sasaki, and Akari Hayashi, Designing Cathode Layers for PEFC with the Low Platinum-Loading, ECS Trans., 10.1149/08613.0497ecst, 86, 13, 497-506, 2018.09.
27. Hirotoshi Odoi, Zhiyun Noda, Junko Matsuda, Akari Hayashi, and Kazunari Sasaki, Pt-Decorated Oxide/MPL/GDL-Supported PEFCs, ECS Trans., 1149/08613.0461ecst, 86, 13, 461-468, 2018.09.
28. Hiromichi Manabe, Yoshiki Nakazato, Makito Okumura, Junko Matsuda, Zhiyun Noda, Akari Hayashi, and Kazunari Sasaki , FIB-SEM 3-Dimensional Nanostructure Observation of PEFC Electrocatalyst Layers, ECS Trans. , 10.1149/08613.0069ecst, 86, 13, 69-75, 2018.09.
29. M. Okumura, Z. Noda, J. Matsuda, Y. Tachikawa, M. Nishihara, S. M. Lyth, A. Hayashi, K. Sasaki, Correlating cathode microstructure with PEFC performance using FIB-SEM and TEM, Journal of the Electrochemical Society, 10.1149/2.0581709jes, 164, 9, F928-F934, 2017.01, The cathode electrocatalyst layers of polymer electrolyte membrane fuel cells (PEFCs) are quantitatively investigated for different ratios of Nafion ionomer. This is achieved using focused-ion-beam coupled scanning electron microscopy (FIB-SEM) to reconstruct the three-dimensional microstructure via tomography. Parameters such as the porosity and pore size distribution were calculated from this data. The distributions of Nafion ionomer, carbon support, and platinum nanoparticles were then further clarified using transmission electron microscopy (TEM). Changes in the PEFC performance (notably the I-V characteristics, the electrochemical surface area, the activation overvoltage, and the concentration overvoltage) are thus correlated to electrode microstructure..
30. Tetsuji Itoh, Yuuta Shibuya, Akira Yamaguchi, Yasuto Hoshikawa, Osamu Tanaike, Tatsuo Tsunoda, Taka-aki Hanaoka, Satoshi Hamakawa, Fujio Mizukami, Akari Hayashi, Takashi Kyotani and Galen D. Stucky, High-performance bioelectrocatalysts created by immobilization of an enzyme into carbon-coated composite membranes with nano-tailored structures, Journal of Materials Chemistry A, 10.1039/c7ta04859a, 5, 20244-20251, 2017.09.
31. Shohei Matsumoto, Masaru Nagamine, Zhiyun Noda, Junko Matsuda, Akari Hayashi, Kazunari Sasaki, Development of PEFC Alloy Electrocatalysts Supported on SnO2, ECS Transactions, 10.1149/08008.0907ecst, 80, 8, 907-918, 2017.08.
32. Yoshiki Nakazato, Daiki Kawachino, Zhiyun Noda, Junko Matsuda, Akari Hayashi, Kazunari Sasaki, SnO2-Supported Electrocatalysts on Various Conductive Fillers for PEFCs, ECS Transactions, 10.1149/08008.0897ecst, 80, 8, 897-906, 2017.08.
33. Keisuke Uda, Zhiyun Noda, Kazunari Sasaki, Akari Hayashi, Electrochemical Characterization of MEAs with Different Pt-Loading for the Efficient Use of Pt, ECS Transactions, 10.1149/08008.0789ecst, 80, 8, 789-799, 2017.08.
34. Daiki Kawachino, Zhiyun Noda, Junko Matsudai, Akari Hayashi, Kazunari Sasaki, Ti-Porous-Sheet-Supported Pt Electrocatalysts for PEFCs, ECS Transactions, 10.1149/08008.0781ecst, 80, 8, 781-787, 2017.08.
35. Masaru Nagamine, Zhiyun Noda, Shohei Matsumoto, Junko Matsuda, Akari Hayashi, Kazunari Sasaki, Photochemical Preparation of Pt Electrocatalysts on SnO2 Support for PEFCs, ECS Transactions, 10.1149/08008.0773ecst, 80, 8, 773-780, 2017.08.
36. Zhiyun Noda, Kyohei Hirata, Akari Hayashi, Toru Takahashi, Naoto Nakazato, Kaori Saigusa, Atsuko Seo, Kiyoshi Suzuki, Seiji Ariura, Hidetoshi Shinkai, Kazunari Sasaki, Hydrogen pump-type impurity sensors for hydrogen fuels, Inter. J. Hydrogen Energy, 10.1016/j.ijhydene.2016.12.066, 42, 5, 3281-3293, 2017.02.
37. Hidemasa Miyamoto, Masahiko Kitamura, Zhiyun Noda, Kazunari Sasaki, Akari Hayashi, Investigation of Degradation at the PEFC Cathode Layer under Higher Temperature Operation, ECS Transactions, 75, 14, 329-337, 2016.09.
38. Makito Okumura, Zhiyun Noda, Junko Matsuda, Masamichi Nishihara, Yuya Tachikawa, Akari Hayashi, Kazunari Sasaki, An FIB-SEM Study on Correlations between PEFC Electrocatalyst Microstructure and Cell Performance, ECS Transactions, 75, 14, 347-354, 2016.09.
39. Bo Fu, Yasuto Minamida, Zhiyun Noda, Kazunari Sasaki, Akari Hayashi, Development of MEAs by Controlling Carbon Structures in Cathode Layers, ECS Transactions, 75, 14, 827-835, 2016.09.
40. Yoshiki Nakazato, Masahiro Iwami, Makito Okumura, Zhiyun Noda, Akari Hayashi, Kazunari Sasaki, SnO2 Supported Electrocatalysts on Conductive Fillers for PEFCs, ECS Transactions, 75, 14, 841-849, 2016.09.
41. Shohei Matsumoto, Masahiro Iwami, Zhiyun Noda, Junko Matsuda, Akari Hayashi, Kazunari Sasaki, PEFC Alloy Electrocatalysts Supported on SnO2: A Study on the Preparation Method, ECS Transactions, 75, 14, 851-858, 2016.09.
42. Hiroki Anai, Junko Matsuda, Zhiyun Noda, Yuya Tachikawa, Akari Hayashi, Kohei Ito, Kazunari Sasaki, Preparation of Iridium-SnO2/VGCF Electrocatalysts for Water Electrolysis, ECS Transactions, 75, 14, 1129-1135, 2016.09.
43. Kazunari SASAKI, Shunsuke Taniguchi, Yusuke Shiratori, Akari Hayashi, Toshihiro Oshima, Yuya Tachikawa, Masamichi Nishihara, Junko Matsuda, Tsutomu Kawabata, Miki Fujita, Ayumi Zaitsu, NEXT-FC: An SOFC-Center for Tight Industry-Academia Collaboration and Demonstration, Proceedings of 12th European SOFC & SOE Forum 2016, 142-151, Chapter 02, 2016.07.
44. Munehiro Inukai, Satoshi Horike, Tomoya Itakura, Ryota Shinozaki, Naoki Ogiwara, Daiki Umeyama, Sanjog Nagarkar, Yusuke Nishiyama, Michal Malon, Akari Hayashi, Takashi Ohhara, Ryoji Kiyanagi, Susumu Kitagawa, Encapsulating Mobile Proton Carriers into Structural Defects in Coordination Polymer Crystals: High Anhydrous Proton Conduction and Fuel Cell Application, J. Am. Chem. Soc., 138, 27, 8505-8511, 2016.06.
45. Makito Okumura, Yohei Nagamatsu, Zhiyun Noda, Yuya Tachikawa, Takeshi Daio, Akari Hayashi, Kazunari Sasaki, A FIB-SEM Study on Correlations between PEFC Electrocatalyst Microstructure and Cell Performance, ECS Transactions, 69, 17, 709-714, 2015.10.
46. Masahiko Kitamura, Zhiyun Noda, Junko Matsuda, Akari Hayashi, Kazunari Sasaki, Investigation of Durability of MEAs at Higher Temperature, ECS Transactions, 69, 17, 701-708, 2015.10.
47. Masahiro Iwami, Dai Horiguchi, Zhiyun Noda, Akari Hayashi, Kazunari Sasaki, Pt-decorated TiO2 Electrocatalysts for PEFCs, ECS Transactions, 69, 17, 603-609, 2015.10.
48. Akari Hayashi, Katsuya Kato, Kazunari Sasaki, Immobilization of an Enzyme into Nano-space of Nanostructured Carbon and Evaluation as Electrochemical Sensors, J. Nanosci. Nanotechnol., 15, 9, 7395-7401, 2015.09.
49. Kazunari Sasaki, Shunsuke Taniguchi, Yusuke Shiratori, Akari Hayashi, Toshihiro Oshima, Masamichi Nishihara, Yuya Tachikawa, Takeshi Daio, Tsutomu Kawabata, Miki Fujita, Ayumi Zaitsu, Smart fuel cell demonstration project: A challenge to realize SOFC-powered campus, ECS Transactions, 68, 1, 171-178, 2015.07.
50. Yuki Sonoda, Akari Hayashi, Yasuto Minamida, Junko Matsuda, Etsuo Akiba, Nanostructure Control of Porous Carbon Materials through Changing Acidity with a Soft-Template Method, Chem. Lett, 44, 4, 503-505, 2015.01.
51. Yasuto Minamida, Zhiyun Noda, Akari Hayashi, Kazunari Sasaki, Development of MEAs with Pt/Mesoporous Carbon as a Cathode Catalyst, ECS Transactions, 64, 3, 137-144, 2014.09.
52. Masahiko Kitamura, Yasuto Minamida, Xiaojing Zhao, Zhiyun Noda, Akari Hayashi, Kazunari Sasaki, Investigation of Performance and Durability of MEAs at Higher Temperature, ECS Transactions, 64, 3, 755-762, 2014.09.
53. Dai Horiguchi, Takuya Tsukatsune, Zhiyun Noda, Akari Hayashi, Kazunari Sasaki, Pt/SnO2 Electrocatalysts on Conductive Fillers, ECS Transactions, 64, 3, 215-220, 2014.09.
54. Yohei Nagamatsu, Kohei Kanda, Zhiyun Noda, Akari Hayashi, Kazunari Sasaki, Electrochemical Performance of MEAs with Pt/SnO2 Mixed with Conductive Filler, ECS Transactions, 64, 3, 207-213, 2014.09.
55. Takuya Tsukatsune, Yuma Takabatake, Zhiyun Noda, Takeshi Daio, Ayumi Zaitsu, Stephen Matthew LYTH, Akari Hayashi, Kazunari Sasaki, Platinum-decorated Tin Oxide and Niobium-doped Tin Oxide PEFC Electrocatalysts: Oxygen Reduction Reaction Activity, J. Electrochem. Soc, 161, F1208-F1213, 2014.08.
56. Tetsuji Itoh, Takeshi Shimomura, Akari Hayashi, Akira Yamaguchi, Norio Teramae, Masatoshi Ono, Tatsuo Tsunoda, Fujio Mizukami, Galen D. Stucky, Taka-aki Hanaoka, Electrochemical enzymatic biosensor with long-term stability by using hybrid mesoporous membrane, Analyst, 139, 18, 4654-4660, 2014.07.
57. Xiaojing Zhao, Akari Hayashi, Zhiyun Noda, Kazunari Sasaki, Evaluation of MEAs Prepared by Pt/C Electrocatalysts with Improved Durability through the Heat Treatment, ECS Transactions, 58, 24, 7-13, 2014.01.
58. Yuma Takabatake, Zhiyun Noda, Stephen Matthew LYTH, Akari Hayashi, Kazunari Sasaki, Cycle Durability of Metal Oxide Supports for PEFC Electrocatalysts, Inter. J. Hydrogen Energy, 39, 10, 5074-5082, 2014.03.
59. Kokei Kanda, Zhiyun Noda, Yohei Nagamatsu, Takahiro Higashi, Shunsuke Taniguchi, Stephen Matthew LYTH, Akari Hayashi, Kazunari Sasaki, Negligible Start-Stop-Cycle Degradation in a PEFC Utilizing Platinum-Decorated Tin Oxide Electrocatalyst Layers with Carbon Fiber Filler, ECS Electrochemistry Letters, 3, 4, F15-F18, 2014.02.
60. Yasuto Minamida, Xiaojing Zhao, Zhiyun Noda, Akari Hayashi, Kazunari Sasaki, Characterization of MEAs Fabricated by a Carbon Support with the Nano-Channel Structure, ECS Transactions, 58, 1, 1105-1111, 2013.10.
61. Takuya Tsukatsune, Yuma Takabatake, Zhiyun Noda, Akari Hayashi, Kazunari Sasaki, Electrochemical Properties and Durability of Electrocatalysts Supported on SnO2, ECS Transactions, 58, 1, 1251-1257, 2013.10.
62. Takahiro Higashi, Zhiyun Noda, Akari Hayashi, Kazunari Sasaki, Pulse Laser Deposition and Sputtering of Carbon-Free Pt/SnO2 Electrocatalysts for PEFC, ECS Transactions, 58, 1, 1293-1299, 2013.10.
63. Yuya Tachikawa, Zhiyun Noda, Akari Hayashi, Yusuke Shiratori, Kazunari Sasaki, Numerical Analysis for Evaluating the Effect of Hydrophilic Anode Support for Water Management in Polymer Electrolyte Fuel Cells, Theoretical and Applied Mechanics Japan, 61, 161-172, 2013.05.
64. Kazunari Sasaki, Kohei Kanda, Yuma Takabatake, Takuya Tsukatsune, Takahiro Higashi, Fumiaki Takasaki, Zhiyun Noda, Akari Hayashi, Alternative Electrocatalyst Support for PEFCs: SnO2-supported Carbon-free Electrocatalysts, Proceedings of 4th European PEFC and H2 Forum 2013, 39, 10, B07_5/109-B07_10/109, 2013.07.
65. Xiaojing Zhao, Akari Hayashi, Zhiyun Noda, Kazunari Sasaki, Development of Durable Electrocatalysts for PEFC through Graphitization of Carbon Support Surface, ECS Transactions, 53, 12, 23-29, 2013.05.
66. Xiaojing Zhao, Akari Hayashi, Zhiyun Noda, Ken’ichi Kimijima, Ichizo Yagi, Kazunari Sasaki, Evaluation of Change in Nanostructure through the Heat Treatment of Carbon Materials and their Durability for the Start/Stop Operation of Polymer Electrolyte Fuel Cells, Electrochim. Acta, 97, 33-41, 2013.03.
67. Akari Hayashi, Kazunari SASAKI, Development of electrocatalysts for polymer electrolyte fuel cells (PEFCs) -challenge for corrosiion-resistant catalyst supports, Shokubai, 55, 1, 9-13, 2013.01.
68. Yuichi Masuda, Shin-ichi Kugimiya, Kazuki Murai, Akari Hayashi, Katsuya Kato, Enhancement of activity and stability of the formaldehyde dehydrogenase by immobilizing onto phenyl-functionalized mesoporous silica, Colloids and Surfaces B: Biointerfaces, 101, 26-33, 2013.01.
69. Zhiyun Noda, Kyohei Hirata, Akari Hayashi, Shunsuke Taniguchi, Naoto Nakazato, Atsuko Seo, Isamu Yasuda, Seiji Ariura, Hidetoshi Shinkai, Kazunari Sasaki, PEFC-type impurity sensors for hydrogen fules, Inter. J. Hydrogen Energy, 37, 21, 16256-16263, 2012.11.
70. Tetsuji Itoh, Yasuto Hoshikawa, Shun-ichi Matsuura, Junko Mizuguchi, Hiroyuki Arafune, Taka-aki Hanaoka, Fujio Mizukami, Akari Hayashi, Hirotomo Nishihara, Takashi Kyotani, Production of L-theanine using glutaminase encapsulated in carbon-coated mesoporous silica with high pH stability, Biochemical Engineering Journal, 68, 207-214, 2012.10.
71. Toru Iijima, Hisayoshi Oshima, Yasuhiko Hayashi, Ulka Bhimrao Suryavanshi, Akari Hayashi, Masaki Tanemura, In-situ observation of carbon nanotube fiber spinning from vertically aligned carbon nanotube forest , Diamond and Related Materials , 24, 158-160, 2012.04.
72. Ako Miyawaki, Toshiaki Hayashi, Tomoharu Tokunaga, Akari Hayashi, Masaki Tanemura, Low-Temperature Fabrication of Germanium Nanostructures by Ion Irradiation: Effect of Supplied Particle Species, Japanese journal of applied physics, 51, 1S, 01AB05/1-01AB05/3, 2012.01.
73. Akari Hayashi, Ichizo Yagi, Ken’ichi Kimijima, Kazunari Sasaki, Electrochemistry in Nano-Space of Structurally Controlled Carbon Materials, ECS Transactions, 41, 19, 15-23, 2012.01.
74. Ulka B. Suryavanshi, Toru Iijima, Akari Hayashi, Yasuhiko Hayashi, Masaki Tanemura, Fabrication of ZnO nanoparticles confined in the channels of mesoporous carbon, Chemical Engineering Journal , 179, 388-393, 2012.01.
75. Zhipeng Wang, Mohd Zamri Yusop, Takehiko Hihara, Pradip Ghosh, Akari Hayashi, Yasuhiko Hayashi, Masaki Tanemura, Fabrication of Ion-Induced Carbon-Cobalt Nanocomposite Fibers: Effect of Cobalt Supply Rate , Journal of nanoscience and nanotechnology, 11, 12, 10677-10681, 2011.12.
76. Kohei Kanda, Shingo Hayashi, Fumiaki Takasaki, Zhiyun Noda, Shunsuke Taniguchi, Yusuke Shiratori, Akari Hayashi, Kazunari Sasaki, Electrochemical Performance of Polymer Electrolyte Fuel Cells Using Carbon-Free SnO2-Supported Pt Electrocatalysts, ECS Transactions, 41, 1, 2325-2331, 2011.12.
77. Fumiaki Takasaki, Satoshi Matsuie, Yuma Takabatake, Zhiyun Noda, Akari Hayashi, Yusuke Shiratori, Kohei Ito, Kazunari Sasaki, Carbon-free Pt Electrocatalysts Supported on SnO2 for Polymer Electrolyte Fuel Cells:Electrocatalytic activity and durability, J. Electrochem. Soc., 158, 10, B1270-B1275, 2011.08.
78. Masashi Kitazawa, Shuichi Ito, Akira Yagi, Nobuaki Sakai, Yoshitugu Uekusa, Ryo Ohta, Kazuhisa Inaba, Akari Hayashi, Yasuhiko Hayashi, Masaki Tanemura, High-Resolution Imaging of Plasmid DNA in Liquids in Dynamic Mode Atomic Force Microscopy Using a Carbon Nanofiber Tip, Japanese Journal of Applied Physics , 50, 8, 08LB14/1-08LB14/4, 2011.08.
79. Ulka B. Suryavanshi, Toru Iijima, Akari Hayashi, Yasuhiko Hayashi,, Masaki Tanemura, Simple methods for tuning the pore diameter of mesoporous carbon, Chem. Commun., 47, 38, 10758-10760, 2011.08.
80. Kazuhisa Inaba, Kouji Saida, Pradip Ghosh, Ken Matsubara, Munisamy Subramanian, Akari Hayashi, Yasuhiko Hayashi, Masaki Tanemura, Masashi Kitazawa, Ryo Ohta, Determination of Young’s modulus of carbon nanofiber probes fabricated by the argon ion bombardment of carbon coated silicon cantilever
, Carbon, 49, 13, 4191-4196, 2011.06.
81. Mohd Zamri Yusop, Debasish Ghosh, Akari Hayashi, Yasuhiko Hayashi, Masaki Tanemura, Masato Sasase, Structural change of ion-induced carbon nanofibers by electron current flow, Journal of Vacuum Science & Technology, B: Nanotechnology & Microelectronics: Materials, Processing, Measurement, & Phenomena , 29, 4, 04E103/1-04E103/4, 2011.05.
82. Pradip Ghosh, Mohd Zamri Yusop, Debasish Ghosh, Akari Hayashi, Yasuhiko Hayashi, Masaki Tanemura, Direct Fabrication of Aligned Metal Composite Carbon Nanofibers on Copper Substrate at Room Temperature and their Field Emission Property, Chemical Communications, 47, 16, 4820-4822, 2011.04.
83. Debasish Ghosh , Pradip Ghosh , Masaki Tanemura , Akari Hayashi , Yasuhiko Hayashi , Kawasaki Shinji , Noboru Miura , Mohd. Zamri Yusop and Toru Asaka , Highly transparent and flexible field emission devices based on single-walled carbon nanotube films , Chem. Commun., 47, 4980-4982, 2011.03.
84. Y. Hayashi, B. Jang, T. Iijima, T. Tokunaga, A. Hayashi, M. Tanemura and G. A. J. Amaratunga, Direct Growth of Horizontally Aligned Carbon Nanotubes between Electrodes and Its Application to Field-Effect Transistors, Journal of Nanoscience and Nanotechnology, 11, 1-4, 2011.01.
85. Tetsuji Itoh, Takeshi Shimomura, Yasuhisa Hasegawa, Junko Mizuguchi, Taka-aki Hanaoka, Akari Hayashi, Akira Yamaguchi, Norio Teramae, Masatoshi Ono, Fujio Mizukami , Assembly of an Artificial Biomembrane by Encapsulation of an Enzyme, Formaldehyde Dehydrogenase, into the Nanoporous-Walled Silica Nanotubes-Inorganic Composite Membrane, J. Mater. Chem. , 21, 251, 2011.01.
86. Mohd Zamri Yusop, Kohei Yamaguchi, Takahito Suzuki, Pradip Ghosh, Akari Hayashi, Yasuhiko Hayashi and Masaki Tanemura, Morphology and size of ion induced carbon nanofibers: Effect of ion incidence angle, sputtering rate and temperature, Jpn. J. Appl. Phys., 50, 01AF10, 2011.01.
87. Ichizo Yagi, Kamba Nomura, Hideo Notsu, Ken’ichi Kimijima, Akari Hayashi, Narumi Ohta, Nanostructures to Probe Electrocatalytic Reactions, ECS Transactions, 28, 17, 111, 2010.11.
88. P. Ghosh, M. Kutsuna, M. Kudo, A. Hayashi, Y. Hayashi and M. Tanemura, Fabrication and Morphological Control of Ion-induced Zinc Nanostructures, Journal of Nanoscience and Nanotechnology , 10, 6677-6682, 2010.10.
89. Ken'ichi Kimijima, Akari Hayashi, Shun Umemura, Junichi Miyamoto, Koshi Sekizawa, Toshihiko Yoshida, Ichizo Yagi, Oxygen Reduction Reactivity of Precisely Controlled Nano-Structured Model Catalyts, J. Phys.Chem. C, 114, 35, 14675, 2010.09.
90. K. Inaba, Y. Sugita, T. Suzuki, M. Tanemura, A. Hayashi, Y. Hayashi, M. Kitazawa, R. Ohta, Size Control of Carbon Nanofiber Probes Fabricated by Ion Irradiation, Japanese Journal of Applied Physics, 49, 08LB15, 2010.08.
91. Z. Wang, M. Zamri Mohd Yusop, T. Hihara, A. Hayashi, Y. Hayashi and M. Tanemura, Formation and growth mechanisms of ion-induced iron-carbon nanocomposites at room temperature, Applied Surface Science , 256, 21, 6371-6374, 2010.08.
92. P. Ghosh, M. Zamri Yusop, S. Satoh, M. Subramanian, A. Hayashi, Y. Hayashi and M. Tanemura, Transparent and Flexible Field Electron Emitters Based on the Conical Nanocarbon Structures, J. Am. Chem. Soc., 132, 4034-4035, 2010.03.
93. M. Zamri, P. Ghosh, Z. P. Wang, M. Kawagishi, A. Hayashi, Y. Hayashi, and M. Tanemura, Direct growth of carbon nanofibers on metal mesh substrates by ion irradiation method, Journal of Vacuum Science & Technology B, 28, C2C9-C2C12, 2010.03.
94. Ichizo Yagi, Akari Hayashi, Ken’ichi Kimijima, Hideo Notsu, Narumi Ohta, Akira Yamaguchi, Mesoporous Materials toward Nanofabricator and Nanoreactor, Electrochemistry, 70, 2, 2-10, 2010.02.