Title

Investigation of platinum oxidation in PEM fuel cells at various relative humidities

Authors

Authors

H. Xu; R. Kunz;J. M. Fenton

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Electrochem. Solid State Lett.

Keywords

OXIDE-GROWTH; KINETICS; Electrochemistry; Materials Science, Multidisciplinary

Abstract

Surface oxidation of Pt cathode of proton exchange membrane (PEM) fuel cells at different relative humidities (RHs) was studied using cyclic voltammetry. The degree of platinum oxidation increased significantly with an increase in RH from 20% to 72%. Holding the cathode at high potentials and exposing it to air instead of N-2 resulted in the formation of more platinum oxides. At 20% RH, 0.85 V, and 100 degrees C, both water and oxygen equally contribute to platinum oxidation; at 100% RH, 0.85 V, and 100 degrees C, water produces more than 70% of the platinum oxidation while 30% forms from oxygen. (c) 2006 The Electrochemical Society.

Journal Title

Electrochemical and Solid State Letters

Volume

10

Issue/Number

1

Publication Date

1-1-2007

Document Type

Article

DOI Link

http://dx.doi.org/10.1149/1.2372230

Language

English

First Page

B1

Last Page

B5

WOS Identifier

WOS:000242165400005

ISSN

1099-0062

Recommended Citation

"Investigation of platinum oxidation in PEM fuel cells at various relative humidities" (2007). Faculty Bibliography 2000s. 7813.
https://stars.library.ucf.edu/facultybib2000/7813