Preparation and electrochemical activities of Pt-Ti alloy PEFC electrocatalysts

Y. Kawasoe, S. Tanaka, T. Kuroki, H. Kusaba, K. Ito, Y. Teraoka, K. Sasaki

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Titanium is one of the most stable materials, remaining undissolved under strongly acidic polymer electrolyte fuel cell (PEFC) conditions. Nanocrystalline Pt-Ti alloy electrocatalysts with a catalyst grain size of several nanometers have been successfully prepared by the colloidal and sol-gel method, characterized by X-ray diffraction, field-emission scanning electron microscope, scanning transmission electron microscope, energy-dispersive X-ray analysis, and X-ray photoelectron spectroscopy. Electrochemical activities were evaluated by current-voltage characteristics measurements using membrane electrode assemblies for humidified H2 fuels with or without 100 ppm CO, cyclic voltammetry, and CO -stripping voltammetry in 0.1 M HClO4. Pt-Ti alloy electrocatalysts exhibited higher electrochemical performance than pure Pt catalyst, i.e., higher activity for oxygen reduction reactions and improved CO tolerance.

Original languageEnglish
Pages (from-to)B969-B975
JournalJournal of the Electrochemical Society
Volume154
Issue number9
DOIs
Publication statusPublished - Aug 6 2007

All Science Journal Classification (ASJC) codes

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

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