Comparison of methanol and ethylene glycol oxidation by alloy and Core-Shell platinum based catalysts

D. Kaplan, L. Burstein, Yu Rosenberg, E. Peled

Research output: Contribution to journalArticlepeer-review

Abstract

Two Core-Shell, RuCore-PtShell and IrNi Core-PtRuShell, XC72-supported catalyst were synthesized in a two-step deposition process with NaBH4 as reducing agent. The structure and composition of the Core-Shell catalysts were determined by EDS, XPS and XRD. Electrochemical characterization was performed with the use of cyclic voltammetry. Methanol and ethylene glycol oxidation activities of the Core-Shell catalysts (in terms of surface and mass activities) were studied at 80 °C and compared to those of a commercial Pt-Ru alloy catalyst. The surface activity of the alloy based catalyst, in the case of methanol oxidation, was found to be superior as a result of optimized surface Pt:Ru composition. However, the mass activity of the PtRu/IrNi/XC72 was higher than that of the alloy based catalyst by ∼50%. Regarding ethylene glycol oxidation, while the surface activity of the alloy based catalyst was slightly higher than that of the Pt/Ru/XC72 catalyst, the latter showed ∼66% higher activities in terms of A g-1 of Pt. These results show the potential of Core-Shell catalysts for reducing the cost of catalysts for DMFC and DEGFC.

Original languageEnglish
Pages (from-to)8286-8292
Number of pages7
JournalJournal of Power Sources
Volume196
Issue number20
DOIs
StatePublished - 15 Oct 2011

Keywords

  • Catalyst
  • Core-Shell
  • Ethylene glycol
  • Methanol
  • Oxidation
  • Platinum

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