IrO2-deposited Pt electrocatalysts for unitized regenerative polymer electrolyte fuel cells

被引：101
|
作者：
Ioroi, T
Kitazawa, N
Yasuda, K
Yamamoto, Y
Takenaka, H
机构：
[1] Natl Inst Adv Ind Sci & Technol AIST Kansai, Special Div Green Life Technol, Osaka 5638577, Japan
[2] Ritsumeikan Univ, Fac Sci & Engn, Dept Chem, Shiga 52577, Japan
来源：
JOURNAL OF APPLIED ELECTROCHEMISTRY | 2001年 / 31卷 / 11期
关键词：
electrocatalyst; iridium oxide; regenerative fuel cell; water electrolysis;
D O I：
10.1023/A:1012755809488
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
An IrO2/Pt electrocatalyst for the polymer electrolyte-type unitized regenerative fuel cell (URFC) was prepared by deposition of iridium oxide (IrO2) particles on Pt black via a colloidal iridium hydroxide hydrate precursor, and URFC performance was examined. After the iridium hydroxide hydrate deposited Pt was calcined at 400 degreesC in air for 1 h, rutile-structure IrO2 particles (20-50 nm dia.) were formed on Pt particle clusters. TEM and pore volume distribution analysis revealed that the microstructure of the deposited IrO2/Pt catalyst was different from the mixed IrO2/Pt catalyst. The cell using the deposited IrO2/Pt (20 at % Ir) catalyst showed similar fuel cell performance with the mixed IrO2/Pt electrode of higher Pt content (10 at % Ir) while maintaining water electrolysis performance. Consequently, 51% round-trip energy conversion efficiency at a current density of 300 mA cm(-2) was attained.
引用
收藏
页码：1179 / 1183
页数：5
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