Electrocatalytic oxidation of hydrogen at platinum-modified polyaniline electrodes

被引：146

作者：

Croissant, MJ ^{[1
]}

Napporn, T ^{[1
]}

Leger, JM ^{[1
]}

Lamy, C ^{[1
]}

机构：

[1] Univ Poitiers, Lab Chim 1, UMR CNRS 6503, F-86022 Poitiers, France

来源：

ELECTROCHIMICA ACTA | 1998年 / 43卷 / 16-17期

关键词：

hydrogen oxidation; dispersed platinum electrode; polyaniline film; reaction mechanism; effect of platinum loading;

D O I：

10.1016/S0013-4686(97)10157-8

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrooxidation of hydrogen at platinum electrodes dispersed ih a polyaniline matrix with several platinum loadings (ranging from 5 to 327 mu g cm(-2)) was investigated using a rotating disc electrode. This allowed us to separate the different contributions (diffusion of molecular hydrogen, adsorption step, electron transfer step) in the overall oxidation process. The variation of the kinetic parameters (Tafel slope, exchange current density, limiting adsorption current) with the platinum loading was interpreted in terms of the different mechanisms usually postulated for the hydrogen oxidation reaction. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：2447 / 2457

页数：11

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