Carbon-supported Pt-Fe alloy as a methanol-resistant oxygen-reduction catalyst for direct methanol fuel cells

A. K. Shukla, R. K. Raman, N. A. Choudhury, K. R. Priolkar, P. R. Sarode, S. Emura, R. Kumashiro

Research output: Contribution to journalArticlepeer-review

165 Citations (Scopus)

Abstract

Crossover of methanol from the anode to the cathode through the polymer-electrolyte membrane in solid-polymer-electrolyte direct methanol fuel cells constitutes a significant loss in their performance. Pt/C and Pt-Fe/C electrocatalysts have been characterized by X-ray diffraction, and X-ray photoelectron and X-ray absorption spectroscopies in conjunction with electrochemistry. It is found that Pt-Fe/C alloy crystallizing in an ordered face centered tetragonal crystal structure with higher proportions of active-platinum sites and a completely different nearest neighbour environment than Pt/C exhibits significantly high oxygen-reduction activity in the presence of methanol while Pt/C shows a methanol poisoning effect under similar conditions.

Original languageEnglish
Pages (from-to)181-190
Number of pages10
JournalJournal of Electroanalytical Chemistry
Volume563
Issue number2
DOIs
Publication statusPublished - 2004 Mar 1
Externally publishedYes

Keywords

  • Direct methanol fuel cells
  • Oxygen-reduction catalyst
  • Pt-Fe alloy
  • X-ray absorption spectroscopy
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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