Effect of platinum present in multi-element nanoparticles on methanol oxidation

Chih Fang Tsai, Kung Yu Yeh, Pu-Wei Wu*, Yi Fan Hsieh, Pang Lin

*Corresponding author for this work

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

Nanoparticles of PtxFe(100-x)/5Co(100-x)/5Ni(100-x)/5Cu(100-x)/5Ag(100-x)/5 (x = 22, 29, 52, 56) were prepared by the sputter depositions on pretreated carbon clothes with their electrocatalytic abilities for the methanol oxidation investigated. XRD analysis of the deposited nanoparticles indicated crystalline fcc phases and SEM images revealed apparent growths of nanoparticulate nodules. Their average sizes were found to increase with the deposition time. Cyclic voltammetry of the deposited samples demonstrated enhancements in the current responses with increasing Pt amount and deposition time. In mass activity, the Pt52Fe11Co10Ni11Cu10Ag8 exhibited the highest values of 462-504 mA/mg. Identical process was conducted to fabricate electrodes with sputtered Pt and Pt43Ru57. In comparison, the Pt52Fe11Co10Ni11Cu10Ag8 showed moderate improvements over that of Pt but was still outperformed by the Pt43Ru57.

Original languageEnglish
Pages (from-to)868-871
Number of pages4
JournalJournal of Alloys and Compounds
Volume478
Issue number1-2
DOIs
StatePublished - 10 Jun 2009

Keywords

  • Catalysis
  • Fuel cells
  • Methanol oxidation
  • Nanostructured materials

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