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研究者情報 |
研究者業績
基本情報
- 所属
- 学習院大学 理学部化学科 特任研究員
- 学位
- 博士(理学)(東海大学大学院)
- 研究者番号
- 10637937
- J-GLOBAL ID
- 201501015060873006
- researchmap会員ID
- B000247109
- 外部リンク
研究キーワード
6経歴
5-
2021年 - 現在
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2020年8月 - 2021年3月
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2018年8月 - 2020年7月
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2016年4月 - 2018年7月
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2012年4月 - 2016年3月
受賞
2論文
27-
Ceramics International 47(11) 15939-15946 2021年6月 査読有り筆頭著者責任著者
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Ceramics 3(1) 114-126 2020年3月19日 査読有りTo avoid the proneness to degradation due to coking in the operation of solid oxide fuel cells (SOFCs) directly running on methane (CH4) fuels, a modified porous anode of the Ni1−XCoX/YSZ (yttria-stabilized zirconia) cermet prepared by an impregnation method is presented. The influence of the Co alloying content on the cermet microstructure, SOFC characteristics, and prolonged cell performance stability has been studied. Co was incorporated into Ni and formed a solid solution of Ni1−XCoX alloy connected with the YSZ as the cermet anode. The porous microstructure of the Ni1−XCoX/YSZ cermet anode formed by sintering exhibited a grain growth with an increase in the Co alloying content. The electrochemical performance of the cells consisting of the Ni1−XCoX/YSZ cermet anode, the YSZ electrolyte, and the LSM (La0.8Sr0.2MnO3) cathode showed an enhancement by the Ni1−XCoX impregnation treatment for the respective supply of H2 and CH4 to the anode. The cell using the Ni0.75Co0.25/YSZ cermet anode (the Ni0.75Co0.25 cell) showed the highest cell performance among the cells tested. In particular, the performance enhancement of this cell was found to be more significant for CH4 than that for H2; a 45% increase in the maximum power density for CH4 and a 17% increase for H2 at 750 °C compared with the performance of the cell using the Ni/YSZ cermet anode. Furthermore, the prolonged cell performance stability with a continuous CH4 supply was found for the Ni0.85Co0.15 and Ni0.75Co0.25 cells at least for 60 h at 750 °C. These enhancement effects were caused by the optimum porous microstructure of the cermet anode with the low anodic polarization resistance.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 42(15) 9493-9499 2017年4月 査読有り
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ADVANCED POWDER TECHNOLOGY 28(1) 73-82 2017年1月 査読有り
MISC
58-
粉体および粉末冶金 64(3) 109‐115(J‐STAGE)-115 2017年<p>To fine-tune the properties of ceramics, they can now be processed into uniform-size nanocrystals with spherical, cube, sheet, rod, wire shapes. Another trend in research aims at arranging individual nanocrystals into superlattices and investigating their unique properties. Despite these recent advances, controlling the shape, crystal structure, and surface characteristics of ceramic nanocrystals is still a difficult task. Here, we report an approach to tailor-made ceramic nanocrystals by means of organic ligand-assisted hydrothermal method. We succeeded in the synthesis of the ceramic nanocrystals such as ceria (CeO2) nanocubes and titania (TiO2) nanosheets. Also importantly, the use of water, instead of an organic solvent, provides an environmentally benign "green" chemistry route to nano building blocks for advanced materials and devices.</p>
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Trans JWRI (Join Weld Res Inst Osaka Univ) 44(1) 15-18 2015年6月High-performance attractive SOFC anode material Ni-GDC-nanocube core-shell composites were successfully fabricated in a solution by chemical reduction method. The novel anode material was composed of a spherical metal Ni core and covering GDC nanocube shell. 200nm size of large Ni spheres provided great porous and Ni-Ni necking framework for current collection as macrostucture. On the surface of Ni spheres, 10nm size of GDC nanocube particles covered with highly reactive{001} crystal facets acquired enlarged triple-phase boundary (TPB) as microstructure. In situ fabrication of Ni-Ni necking framework was achieved by crystal growth of Ni spheres during generation tests even at 500℃ operating. The non-sintered Ni-GDC-nanocube core-shell anode showed a higher power density compared with conventional Ni-GDC-anodes sintered at 1300℃.The designated macro-and microstructure of Ni-GDC core-shell anodes were maintained after generation testd even at 700℃ operating.
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日本セラミックス協会秋季シンポジウム講演予稿集(CD-ROM) 27th ROMBUNNO.2I06 2014年8月25日
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Trans JWRI (Join Weld Res Inst Osaka Univ) 43(1) 21-24 2014年6月Tailor-made TiO_<2> nanocrystals with well-defined exposed facets have attracted increasing research interest recently. The exposed facets greatly determine the reactive activity of TiO_<2> nanocrystals and dominate their application potential. Size-controllable TiO_<2> nanosheets with highly reactive {001} facets were synthesized by a conventional hydrothermal synthesis process. The particle sizes ranged from 25 nm to several micrometres and a tuneable percentage of {001} surface area ranged from 50% to 90% according to the particle size. TiO_<2> single crystal and higher-level mesoscopic assemblies with {001} facets, and TiO_<2> hollow microspheres were successfully synthesized by the modified hydrothermal approaches in this study.
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Trans JWRI (Join Weld Res Inst Osaka Univ) 42(2) 21-23 2013年12月Ceria and Gd-doped Ceria (GDC) nanocubes covered with highly reactive {001} facets were synthesized via organic-ligand-assisted hydrothermal treatment with water soluble amino acid 6–amino hexanoic acid (AHA). The particle shape and size were much controlled and these nanocube materials were easily dispersed in water and alcohol solvent. It can be noted that the coordinate of AHA had hydrophilic groups and short methylene chains.
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プラズマ応用と複合機能材料 22 35-36 2013年3月
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IUMRS-International Conference on Electronic materials (IUMRS-ICEM 2012) 2012年9月
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12th IUMRS International Conference in Asia 2011年9月
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The 9th International Meeting of Pacific Rim Ceramic Societies (PacRim 9) 2011年7月
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The 9th International Meeting of Pacific Rim Ceramic Societies (PacRim 9) 2011年7月
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The 2010 International Chemical Congress of Pacific Basin Societies (Pacifichem 2010) 2010年12月
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The 2010 International Chemical Congress of Pacific Basin Societies (Pacifichem 2010) 2010年12月
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The 2010 International Chemical Congress of Pacific Basin Societies (Pacifichem 2010) 2010年12月
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The 3rd International Congress on Ceramics （ICC3） 2010年11月
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The 2nd International Solvothermal ＆ Hydrothermal Association Conference (ISHA 2010) 2010年7月
講演・口頭発表等
42-
AMDI-5 Conjunction with 6th IBB Frontier Symposium 2014年11月
所属学協会
3共同研究・競争的資金等の研究課題
2-
公益財団法人 内田エネルギー科学振興財団 試験研究費助成 2019年7月 - 2020年3月
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日本学術振興会 若手研究（B） 2015年4月 - 2017年3月