articleElectrochemical and Solid-State LettersDec 5, 2003Closed access

Electrocatalytic Corrosion of Carbon Support in PEMFC Cathodes

LMLaura M. RoenCHC. H. PaikTDT. D. Jarvi

University of Washington · Hartford Financial Services (United States)

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Abstract

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 generation rates increased with higher Pt mass fraction (0, 10, and 39% balanced by Vulcan XC-72). A peak observed at approximately for Pt/C was lowered to for PtRu/C. An Arrenhius plot indicated higher apparent activation energy for 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. © 2003 The Electrochemical Society. All…

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Topics & keywords

Topics
Keywords
  • Cyclic voltammetry
  • Materials science
  • Platinum
  • Electrochemistry
  • Catalysis
  • Proton exchange membrane fuel cell
  • Corrosion
  • Carbon fibers
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