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 publicationECS Transactions
Pages21-36
Number of pages16
Volume2
Edition8
DOIs
Publication statusPublished - 2007
Externally publishedYes
EventElectrochemical Society Inc, Battery Division - Denver, CO
Duration: 7 May 200612 May 2006

Other

OtherElectrochemical Society Inc, Battery Division
CityDenver, CO
Period7/5/0612/5/06

Fingerprint

Rotating disks
Fuel cells
Electrolytes
Degradation
Electrodes
Catalysts
Acids
Carbon
Corrosion
Adsorption
Hydrogen
Kinetics
Oxygen
Platinum
Agglomeration
Membranes
Thin films

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Rotating disk electrode investigations of fuel cell catalyst degradation due to potential cycling in acid electrolyte. / Merzougui, Belabbes; Swathirajan, Swathy.

ECS Transactions. Vol. 2 8. ed. 2007. p. 21-36.

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

Merzougui, B & Swathirajan, S 2007, Rotating disk electrode investigations of fuel cell catalyst degradation due to potential cycling in acid electrolyte. in ECS Transactions. 8 edn, vol. 2, pp. 21-36, Electrochemical Society Inc, Battery Division, Denver, CO, 7/5/06. https://doi.org/10.1149/1.2424285
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