Electrocatalytic Corrosion of Carbon Support in PEMFC Cathodes

The influence of platinum on the corrosion of carbon catalyst supports has been characterized by on-line mass spectroscopy during cyclic voltammetry, with varying Pt mass fraction, catalyst type, and temperature. The CO(2) generation rates increased with higher Pt mass fraction (0, 10, and 39% balan...

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Bibliographic Details
Published in:Electrochemical and solid-state letters 2004, Vol.7 (1), p.A19-A22
Main Authors: Roen, L. M., Paik, C. H., Jarvi, T. D.
Format: Article
Language:English
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Summary:The influence of platinum on the corrosion of carbon catalyst supports has been characterized by on-line mass spectroscopy during cyclic voltammetry, with varying Pt mass fraction, catalyst type, and temperature. The CO(2) generation rates increased with higher Pt mass fraction (0, 10, and 39% balanced by Vulcan XC-72). A peak observed at approximately +0.55 V(RHE) for Pt/C was lowered to +0.45 V(RHE) for PtRu/C. An Arrenhius plot indicated higher apparent activation energy for CO(2) production at the positive potential limit of the cyclic voltammogram on 0% Pt (carbon-only) electrode than on 39% Pt/C electrode. It was concluded that platinum accelerated the corrosion rate of the carbon catalyst support.
ISSN:1099-0062
DOI:10.1149/1.1630412