Iridium oxide/platinum electrocatalysts for unitized regenerative polymer electrolyte fuel cells

被引：164
|
作者：
Ioroi, T [1 ]
Kitazawa, N
Yasuda, K
Yamamoto, Y
Takenaka, H
机构：
[1] Osaka Natl Res Inst, Dept Energy & Environm, Ikeda, Osaka 5638577, Japan
[2] Ritsumeikan Univ, Fac Sci & Engn, Dept Chem, Shiga 52577, Japan
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2000年 / 147卷 / 06期
关键词：
D O I：
10.1149/1.1393478
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
To improve the water electrolysis performance of unitized regenerative fuel cells, ultrafine IrO2 powder was synthesized from colloidal precursors, and an active electrode for oxygen evolution and reduction was prepared by mixing the IrO2 powder and Pt black. Analysis showed that the surface area of the synthesized IrO2 was higher than that of high-surface-area Pt black. During fuel cell operation, IrO2 increased the overpotential slightly; however during water electrolysis, the mixed Pt-IrO2 electrocatalyst had a considerably higher activity for oxygen evolution. The addition of only a small amount of IrO2 (10-30 mol %) to the oxygen electrode was sufficient for the unitized regenerative fuel cell. (C) 2000 The Electrochemical Society. S0013-4651(99)09-093-X. All rights reserved.
引用
收藏
页码：2018 / 2022
页数：5
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