Electron and proton transport in gas diffusion electrodes containing electronically conductive proton-exchange polymers

被引：83

作者：

Qi, ZG ^{[1
]}

Lefebvre, MC ^{[1
]}

Pickup, PG ^{[1
]}

机构：

[1] Mem Univ Newfoundland, Dept Chem, St Johns, NF A1B 3X7, Canada

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1998年 / 459卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

conducting polymer; polypyrrole; fuel cell; impedance; oxygen reduction; gas diffusion electrode;

D O I：

10.1016/S0022-0728(98)00241-1

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A novel supported catalyst has been prepared by the chemical deposition of Pt particles on a polypyrrole \ polystyrenesulphonate (PPY \ PSS) composite. The chemically prepared polymer particles were designed to provide a porous, proton and electron conducting catalyst support for use in fuel cells. Transmission electron microscopy, conductivity measurements, impedance spectroscopy, and cyclic voltammetry confirm that these properties have been achieved. The chemically prepared PPY \ PSS composite exhibits very high proton conductivities that are several orders of magnitude higher than for electrochemically prepared films. Currents of 0.1 A cm(-2) have been observed for oxygen reduction in proton exchange membrane (PEM) fuel cell type gas diffusion electrodes. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：9 / 14

页数：6

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