ION TRANSPORTING COMPOSITE MEMBRANES .2. ION-TRANSPORT MECHANISM IN NAFION-IMPREGNATED GORE-TEX MEMBRANES

被引：48

作者：

LIU, C

MARTIN, CR

机构：

[1] Department of Chemistry, Texas A&M University, Texas 77843, College Station

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1990年 / 137卷 / 02期

关键词：

Electrodes; Electrochemical;

D O I：

10.1149/1.2086489

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Our previous report suggested that Ru(NH3)63+ diffusion coefficients are higher in Nafion™1-impregnated Gore-Tex (NIGT) membranes than in bulk Nafion membranes. This paper focuses on the mechanism of Ru(NH3)63+ transport in NIGT membranes. We investigate the dependencies of the diffusion coefficients on the concentration of the electroactive species and on the weight fraction of Nafion in NIGT membranes. The apparent diffusion coefficients for Ru(NH3)63+ and ru(nh3)62+ are directly proportional to the inverse weight fraction of Nafion in the NIGT membrane. We propose that the diffusion of the ions are coupled between the ions residing in the solution phase and the ions electrostatically bound to SO3− sites in the Nafion phase. By controlling the weight fraction of the Nafion in the NIGT membranes, we are able to vary Ru(NH3)63+ and Ru(NH3)62+ diffusion coefficients from 3 × 10−8 cm2/s to 3 × 10−7 cm2/s. © 1990, The Electrochemical Society, Inc. All rights reserved.

引用

页码：510 / 515

页数：6

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