Rotating disk electrode investigations of fuel cell catalyst degradation due to potential cycling in acid electrolyte

Belabbes Merzougui, Swathy Swathirajan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Fuel cells operated under cyclic conditions in automotive operations are more vulnerable to membrane and electrode material degradation. Degradation of Pt catalyst due to potential cycling was characterized by loss of hydrogen adsorption (HAD) area and shift in the half-wave potential for oxygen reduction at a thin film catalyst rotating disk electrode. Potential cycling between 0 and 1.2 V (RHE) for 500 cycles caused about 20-30 % decrease in HAD area for two carbon-supported platinum catalysts. This decrease followed second order kinetics, indicating that the loss of surface area is probably caused by agglomeration of Pt particles due to carbon corrosion. Analysis of oxygen reduction kinetic losses shows an increase in Tafel slope due to potential cycling probably due to a change in the morphology of the carbon support caused by corrosion reactions. Three mechanisms are discussed for the loss of surface area and activity of Pt catalyst due to cycling. copyright The Electrochemical Society.

Original languageEnglish
Title of host publicationElectrode Materials and Processes for Energy Conversion and Storage
Pages21-36
Number of pages16
Edition8
DOIs
Publication statusPublished - 1 Dec 2007
EventElectrochemical Society Inc, Battery Division - Denver, CO, United States
Duration: 7 May 200612 May 2006

Publication series

NameECS Transactions
Number8
Volume2
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

ConferenceElectrochemical Society Inc, Battery Division
CountryUnited States
CityDenver, CO
Period7/5/0612/5/06

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Merzougui, B., & Swathirajan, S. (2007). Rotating disk electrode investigations of fuel cell catalyst degradation due to potential cycling in acid electrolyte. In Electrode Materials and Processes for Energy Conversion and Storage (8 ed., pp. 21-36). (ECS Transactions; Vol. 2, No. 8). https://doi.org/10.1149/1.2424285