Optimum condition for the growth of Pt-CeO2 nanocomposite electrodes for thin-film fuel cells

Hyo Jin Ahn, Ja Soon Jang, Yung Eun Sung, Tae Yeon Seong

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16 Citations (Scopus)

Abstract

We fabricated three types of nanocomposite electrodes consisting of different amounts of metallic Pt nanostructures and amorphous CeO2 using a co-sputtering method and investigated the optimum conditions for enhancing their electro-oxidation properties in direct methanol thin-film fuel cells. The high-resolution electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy results show the formation of metallic Pt nanostructures embedded within an amorphous CeO2 matrix (i.e., Pt-CeO2 nanocomposite). The cyclic voltammetry and chronoamperometry results demonstrate that the nanocomposite electrode containing ∼87.2 wt% of Pt shows the best catalytic activity of methanol electro-oxidation, the highest electrochemical active surface (EAS) area, and the best electrochemical stability among the three samples for direct methanol thin-film fuel cells.

Original languageEnglish
JournalJournal of Alloys and Compounds
Volume473
Issue number1-2
DOIs
Publication statusPublished - 2009 Apr 3

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Keywords

  • Electrochemical reactions
  • Electrode materials
  • Nanostructured materials

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

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