Structure and activity of carbon-supported Pt-Co electrocatalysts for oxygen reduction

被引：190

作者：

Salgado, JRC ^{[1
]}

Antolini, E ^{[1
]}

Gonzalez, ER ^{[1
]}

机构：

[1] USP, Inst Quimica Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2004年 / 108卷 / 46期

关键词：

D O I：

10.1021/jp0486649

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Carbon-supported Pt-Co electrocatalysts in the Pt:Co atomic ratio 85:15, mainly for application in polymer electrolyte fuel cells, have been prepared by different methods. The materials were tested in single cells with respect to the oxygen reduction reaction and their performances were compared. Of the several methods considered, the preparation of the electrocatalyst via the deposition and reduction of a Co precursor on previously formed carbon-supported platinum gave the best results. By increasing the Co content, a decrease of metal particle size and an improvement in the activity for the ORR of these catalysts was observed. For the electrocatalysts with a Pt:Co atomic ratio of 75:25, a good stability upon cycling was also found.

引用

页码：17767 / 17774

页数：8

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