IMPROVED ELECTROCATALYTIC OXYGEN REDUCTION PERFORMANCE OF PLATINUM TERNARY ALLOY-OXIDE IN SOLID-POLYMER-ELECTROLYTE FUEL-CELLS

被引：84

作者：

TAMIZHMANI, G

CAPUANO, GA

机构：

[1] Department of Chemistry, Montreal, Quebec

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1994年 / 141卷 / 04期

关键词：

D O I：

10.1149/1.2054866

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The effect of base metal oxide (nonnoble metal oxide) in a Pt-Cr-Cu alloy catalyst is investigated for the oxygen reduction reaction in a solid-polymer-electrolyte fuel cell. The cathode mass activities ai 0.9 V for Pt, Pt-Cr alloy, Pt-Cr-Cu alloy, and a mixture of Pt-Cr-Cu alloy with base metal oxide are compared. The enhancement factor is largest (about 6 times) for the mixture of Pt-Cr-Cu alloy with base metal oxide, compared to Pt-Cr and Pt-Cr-Cu alloys (about 2 times). The higher electrocatalytics activity of this material may be due to the combined effects of the Pt-Cr-Cu alloy and the base metal oxide. The physical and electrochemical characterizations are carried out using various techniques like x-ray diffraction, transmission electron microscopy, cyclic voltammetry, polarization, and ac impedance.

引用

页码：968 / 975

页数：8

共 24 条

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