Electroxidation of H2 on Pt/C Pt-Ru/C and Pt-Mo/C anodes for polymer electrolyte fuel cell

被引：65

作者：

Pozio, A

Giorgi, L

Antolini, E

Passalacqua, E

机构：

[1] ENEA, CR Casaccia, I-00060 Rome, Italy

[2] ITAE, CNR, I-98126 Messina, Italy

来源：

ELECTROCHIMICA ACTA | 2000年 / 46卷 / 04期

关键词：

hydrogen oxidation; electrocatalyst; gas/diffusion electrodes; polymer electrolyte fuel cell; platinum alloy;

D O I：

10.1016/S0013-4686(00)00625-3

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Pt/C, Pt-Ru/C and Pt-Mo/C electrocatalysts are used for hydrogen oxidation in polymer electrolyte fuel cells (PEFGs). In this paper, we report a semi-empirical equation that fits experimental electrode potential versus current density data for gas diffusion anodes using these electrocatalysts. The physico-chemical interpretation of all parameters used in the equation is also given. The presence of a strong kinetic limitation on Pt-M/C (M = Ru or Mo) electrodes is demonstrated. A Heyrowsky-Volmer mechanism for the hydrogen oxidation reaction is proposed on Pt-Mo/C and Pt-Ru/C. Accurate analysis of the cell voltage Versus current density plots of polymer electrolyte fuel cells with Pt-Mo/C anodes show that it is difficult to evaluate the best Pt/Mo atomic ratio from full-cell measurements, while half-cell data are more useful for kinetic studies. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：555 / 561

页数：7