Title

Effect of catalyst properties on membrane degradation rate and the underlying degradation mechanism in PEMFCs

Authors

Authors

V. O. Mittal; H. R. Kunz;J. M. Fenton

Comments

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Abbreviated Journal Title

J. Electrochem. Soc.

Keywords

FUEL-CELLS; PLATINUM DISSOLUTION; POLYMER MEMBRANES; OXYGEN REDUCTION; MODEL; Electrochemistry; Materials Science, Coatings & Films

Abstract

Nafion membrane degradation was studied in a polymer electrolyte membrane fuel cell (PEMFC) under accelerated decay conditions. Fluoride emission rate (FER) determined by fuel cell effluent water analysis was used to quantify the membrane degradation. Membrane degradation is most likely caused either directly or indirectly by the species formed as a result of the H-2 and O-2 reaction on the catalyst. To further understand the mechanism, the effects of the catalyst location, type, its interaction with O-2 and H2O, and cell current density on the FER were investigated and their implications on the underlying membrane degradation mechanism are discussed.

Journal Title

Journal of the Electrochemical Society

Volume

153

Issue/Number

9

Publication Date

1-1-2006

Document Type

Article

Language

English

First Page

A1755

Last Page

A1759

WOS Identifier

WOS:000239250600018

ISSN

0013-4651

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