Kinetic Study on Superior Performance of Silica-Coated Cathode Catalysts for PEFC
| Project/Area Number |
23360350
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Reaction engineering/Process system
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| Research Institution | Kyushu University |
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Principal Investigator |
KISHIDA Masahiro 九州大学, 工学(系)研究科(研究院), 教授 (60243903)
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| Project Period (FY) |
2011-11-18 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 固体高分子形燃料電池 / カソード電極触媒 / シリカ被覆 / 耐久性向上 / 物質移動 / 速度解析 / 反応工学・プロセスシステム |
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| Research Abstract |
We have reported that supported Pt catalysts covered with silica layer showed extremely high durability for the cathode in PEFC, but the layer might limit reaction rate due to slow mass transfer within the silica layer. In this work we studied on the mass transfer in silica layer and on the reason for the superior durability of the coated catalyst. The structure of silica layer was successfully controlled by changing coating condition. The silica layer prepared using methyltriethoxysilane has larger pore size and exhibited both the high activity and high durability. The reason why the coating catalysts show high durability could not be revealed, but the interaction between metal surface and silica layer, or positive charge of silica layer might suppress the dissolution of Pt species during reaction. Finally, it was also found that the coated Pd-Co catalysts showed extremely high durability for the cathode in PEFC, as compared with uncoated catalysts.
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Report
(4 results)
Research Products
(7 results)
