Solid-state electrochemical oxygen reduction at Pt|Nafion® 117 and Pt|BAM3G™ 407 interfaces

被引：94
作者：
Basura, VI [1 ]
Beattie, PD [1 ]
Holdcroft, S [1 ]
机构：
[1] Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1998年 / 458卷 / 1-2期
基金：
加拿大自然科学与工程研究理事会;
关键词：
BAM3G (TM); Nafion (R); oxygen reduction;
D O I：
10.1016/S0022-0728(98)00338-6
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Mass transport parameters are determined for oxygen reduction in two different proton exchange membranes: (1) Nafion(R) 117 (Du Pont)-equivalent weight 1100 g mol(-1); and (2) a novel experimental membrane manufactured by Ballard Advanced Materials Corporation (BAM3G(TM) 407) with an equivalent weight of 407 g mol(-1). These two membranes differ in their chemical structure, equivalent weight, and water content. Solid-state electrochemistry shows that the permeability (the product of diffusion coefficient and solubility) of oxygen for the two membrane materials is approximately the same. The solubility of oxygen in the novel BAM3G 407 membrane investigated is lower than that for Nafion 117 by a factor of four. The diffusion coefficient of oxygen in BAM3G 407 on the other hand is greater by a factor of four. The difference in mass transport properties is explained on the basis of the much higher water content in the BAM3G 407 membrane (87 wt.% H2O) compared to Nafion 117(19 wt.% H2O). (C) 1998 Elsevier Science S.A. All rights reserved.
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页码：1 / 5
页数：5
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