Oxygen reduction reaction on platinum/tantalum oxide electrocatalysts for PEM fuel cells

Olga A. Baturina, Yannick Garsany, Thomas J. Zega, Rhonda M. Stroud, Terence Schull, Karen E. Swider-Lyons

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

We investigate platinum supported on tantalum oxide as a possible catalyst for oxygen reduction reaction (ORR) in proton exchange membrane (PEM) fuel cells. Three synthetic routes are evaluated to compare activities of tantalum-oxide-supported platinum fuel cell electrocatalysts: (i) deposition of platinum colloids on tantalum oxide followed by mechanical grinding with Vulcan carbon (VC); (ii) deposition of tantalum oxide on VC, followed by the deposition of platinum colloids; and (iii) deposition of Pt colloids on VC, followed by deposition of tantalum oxide. These are compared to a PtVC standard made with the same Pt colloids. The area-specific activities for the ORR at 0.9 V are a factor of 1.5 higher for catalysts synthesized via preparation route (ii) compared to a PtVC standard. The area-specific activities of the catalysts synthesized via routes (i) and (iii) are close to that of PtVC. The higher area-specific activity of the catalyst synthesized by route (ii) may be due to the preferential adsorption of OH groups to the oxide vs platinum surface.

Original languageEnglish (US)
Pages (from-to)B1314-B1321
JournalJournal of the Electrochemical Society
Volume155
Issue number12
DOIs
StatePublished - Nov 5 2008
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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