Components for PEM fuel cell systems using hydrogen and CO containing fuels

被引：154
|
作者：
Divisek, J
Oetjen, HF
Peinecke, V
Schmidt, VM
Stimming, U
机构：
[1] Fachhsch Mannheim, Inst Umwelttech, D-69163 Mannheim, Germany
[2] Forschungszentrum Julich, Inst Energieverfahrenstech, D-52425 Julich, Germany
[3] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany
来源：
ELECTROCHIMICA ACTA | 1998年 / 43卷 / 24期
关键词：
proton exchange membrane fuel cell (PEMFC); CO poisoning; CO removal; PtRu anodes; H(2)O(2) addition;
D O I：
10.1016/S0013-4686(98)00140-6
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Proton exchange membrane fuel cells (PEMFC) show a significant performance drop in CO containing hydrogen as fuel gas in comparison to pure hydrogen. The lower performance is due to CO adsorption at the anode thus poisoning the hydrogen oxidation reaction. Two approaches to improve the cell performance are discussed. First, the use of improved electrocatalysts for the anode, such as PtRu alloys, can significantly enhance the CO tolerance. On the other hand, CO poisoning of the anode could be avoided by the use of non-electrochemical methods. For example, the addition of liquid hydrogen peroxide to the humidification water of the cell leads to the formation of active oxygen by decomposition of H(2)O(2) and the oxidation of CO. In such a way a complete recovery of the CO free cell performance is achieved for H(2)/100 ppm CO. (C) 1998 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：3811 / 3815
页数：5
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