Investigation of enhanced CO tolerance in proton exchange membrane fuel cells by carbon supported PtMo alloy catalyst

被引：195

作者：

Mukerjee, S ^{[1
]}

Lee, SJ

Ticianelli, EA

McBreen, J

Grgur, BN

Markovic, NM

Ross, PN

Giallombardo, JR

De Castro, ES

机构：

[1] Brookhaven Natl Lab, Dept Appl Sci, Upton, NY 11973 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[3] ETEK Inc, Natick, MA 01760 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 1999年 / 2卷 / 01期

关键词：

D O I：

10.1149/1.1390718

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We report a two- to threefold enhancement of CO tolerance in a proton exchange membrane (PEM) fuel cell, exhibited by carbon supported nanocrystalline PtMo/C as compared to the current state of the art PtRu/C electrocatalysts. The bulk of these nanocrystals were comprised of Pt alloyed with Mo in the ratio 8.7: 1.3 as shown by both X-ray diffraction and in situ extended X-ray absorption fine structure measurements. Rotating disk electrode measurements and cyclic voltammetry in a PEM fuel cell indicate the onset of CO oxidation at potentials as low as 0.1 V. Further, the oxidation of CO exhibits two distinct peaks, indicating redox behavior involving oxyhydroxides of Mo. This is supported by in situ X-ray absorption near edge structure measurements at the Mo K edge. (C) 1999 The Electrochemical Society. S1099-0062(98) 08-029-8. All rights reserved.

引用

页码：12 / 15

页数：4

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