Development of method for synthesis of Pt-Co cathode catalysts for PEM fuel cells

被引：43

作者：

Li, Xuguang ^{[1
]}

Colon-Mercado, Hector R. ^{[1
]}

Wu, Gang ^{[1
]}

Lee, Jong-Won ^{[1
]}

Popov, Branko N. ^{[1
]}

机构：

[1] Univ S Carolina, Dept Chem Engn, Ctr Electrochem Engn, Columbia, SC 29208 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2007年 / 10卷 / 11期

关键词：

D O I：

10.1149/1.2777009

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A procedure was developed to synthesize a platinum-cobalt (Pt-Co) alloy electrocatalyst for oxygen reduction using Co/C composite as a support. The Pt-Co/C catalysts were synthesized through: (i) chemical oxidation of carbon black, (ii) Co deposition on the oxidized carbon using a chelation method, (iii) chemical treatment in an acidic medium to remove excess of Co on the carbon surface, (iv) Pt deposition onto the Co/C support, and (v) postheat treatment to form the Pt-Co alloy catalyst. The synthesized Pt-Co/C catalyst showed improved activity and long-term stability in polymer electrolyte membrane (PEM) fuel cells when compared with a conventional Pt-Co/C catalyst. The electron probe microanalysis combined with scanning electron microscopy indicated that the Co content in the alloy catalyst remains stable without poisoning of the electrolyte membrane during long-term operation.

引用

页码：B201 / B205

页数：5

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