A Mechanistic Study of Perfluorosulfonic Acid Membrane Water Permeance Degradation in Air

被引：10
|
作者：
Coms, Frank D. [1 ]
Fuller, Timothy J. [1 ]
Schaffer, Corey P. [2 ]
机构：
[1] Gen Motors Co, Global Fuel Cell Act, Pontiac, MI 48340 USA
[2] Ford Motor Co, Dearborn, MI 48124 USA
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2018年 / 165卷 / 06期
关键词：
CHEMICAL DEGRADATION; FUEL; PERFORMANCE; DURABILITY; AEROSOLS; AMMONIUM;
D O I：
10.1149/2.0141806jes
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Perfluorosulfonic acid (PFSA) membranes subjected to aging in air form a degradation product with decreased water content and water permeance. FTIR kinetics studies performed on a range of membrane thicknesses shows that reaction exhibits zero-order kinetics, has a very weak temperature dependence and a strong dependence on air velocity. Reactions performed in nitrogen or synthetic air do not form the degradation product. The kinetic data, in combination FTIR spectra of deuterium exchanged products indicate that the degradation product results from an acid-base reaction between ultra-trace levels of atmospheric ammonia and the sulfonic acid groups of the PFSA membrane. (C) The Author(s) 2018. Published by ECS.
引用
收藏
页码：F3104 / F3110
页数：7
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