ELECTROCATALYSIS OF THE HYDROGEN OXIDATION AND OF THE OXYGEN REDUCTION REACTIONS ON PT AND SOME ALLOYS IN ALKALINE-MEDIUM

被引：47

作者：

COUTURIER, G ^{[1
]}

KIRK, DW ^{[1
]}

HYDE, PJ ^{[1
]}

SRINIVASAN, S ^{[1
]}

机构：

[1] INST HYDROGEN SYST,MISSISSAUGA L5L 1J9,ONTARIO,CANADA

来源：

ELECTROCHIMICA ACTA | 1987年 / 32卷 / 07期

关键词：

CATALYSTS - Platinum - ELECTRODES - Materials - FUEL CELLS - Materials - METALS AND ALLOYS - Spectroscopic Analysis;

D O I：

10.1016/0013-4686(87)90024-7

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The objectives of the present study were to find substitutes for platinum as electrocatalysts for alkaline fuel cells. For this purpose, electrode kinetic studies were carried out for the hydrogen oxidation reaction on the metals Pt and Ni and on the alloys Pt-Ni, Pt-Ti and Ni-Ti and for the oxygen reduction on Pt and the alloys Pt-Cr, Pt-Ta and Pt-Cr-Ta. The results for Pt substitution were more encouraging for the oxygen reduction reaction. The alloy Pt-Cr-Ta showed a considerably better performance than platinum. This alloy displayed a single Tafel slope (45 mV decade** minus **1) at 55 and 70 degree C, while two Tafel slopes were observed for all other electrodes. The Pt-Ta alloy also exhibited a better electrode kinetic behavior and like Pt-Cr-Ta is a potential substitute for Pt for this reaction.

引用

页码：995 / 1005

页数：11

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