Preparation and characterization of carbon-supported Pt-Au cathode catalysts for oxygen reduction reaction

Chen Wei Liu, Yu Chen Wei, Kuan Wen Wang

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Alloy catalysts of Pt-Au/C with various Pt/Au ratios were prepared for an oxygen reduction reaction (ORR). The structure, surface species, surface compositions, and electrocatalytic activities of prepared alloy catalysts were characterized by XRD, TPR, XPS, and rotating disk electrode (RDE) techniques, respectively. It was observed that the ORR activity of the Pt75Au25/C alloy catalyst was enhanced significantly in comparison to the commercial Pt/C catalyst within the mixed kinetic-diffusion control region. The alloying with Au modified the oxophilicity of Pt-Au alloy catalysts. TPR characterization suggests that the enhancement of Pt75Au25/C was attributed to the formation of an alloy surface, having a moderate oxophilicity and a Pt-related alloy surface species.

Original languageEnglish
Pages (from-to)654-657
Number of pages4
JournalJournal of Colloid and Interface Science
Volume336
Issue number2
DOIs
StatePublished - 15 Aug 2009

Keywords

  • Alloying
  • Oxygen reduction reaction (ORR)
  • Platinum-gold catalysts
  • Temperature-programmed reduction (TPR)

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