Effect of carbon substrate materials as a Pt-Ru catalyst support on the performance of direct methanol fuel cells

Eunjoo Yoo, Tatsuhiro Okada, Tokushi Kizuka, Junji Nakamura

Research output: Contribution to journalArticlepeer-review

84 Citations (Scopus)

Abstract

The support effect of carbon nanotubes (CNTs) for direct methanol fuel cell (DMFC) was studied using CNTs with and without defect preparation, carbon black, and fishbone-type CNTs. The Pt-Ru/defect-free CNTs afforded the highest catalytic activity of methanol oxidation reaction (MOR) in rotating disk electrode experiments and the highest performance as the anode catalysts in DMFC single cell tests with the one-half platinum loading compared to Pt-Ru/VulcanXC-72R. CO stripping voltammograms with Pt-Ru/defect-free CNTs also revealed the lowest CO oxidation potential among other Pt-Ru catalysts using different carbon support. It is thus considered that the carbon substrates significantly affect the CO oxidation activity of anode electrocatalysts in DMFC. This is ascribed to the geometrical effect that the flat interface between CNTs and metal catalysts has a unique feature, at which the electron transfer occurs, and this interface would modify the catalytic properties of Pt-Ru particles.

Original languageEnglish
Pages (from-to)221-226
Number of pages6
JournalJournal of Power Sources
Volume180
Issue number1
DOIs
Publication statusPublished - May 15 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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