Ordered silicon nanocones as a highly efficient platinum catalyst support for direct methanol fuel cells

Jitendra N. Tiwari, Te Ming Chen, Fu-Ming Pan*, Kun Lin Lin

*Corresponding author for this work

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Platinum nanoparticles were electrodeposited on ordered silicon nanocones (SNCs) and used as the catalyst for methanol electro-oxidation in direct methanol fuel cells (DMFCs). Because of uniform dispersion of Pt nanoparticles and the high surface area, the Pt-SNC electrode exhibited superior electrocatalytic properties toward the methanol electro-oxidation, with the onset potential of 0.08 V (vs. SCE). According to chronoamperometric analysis and CO stripping cyclic voltammetric (CV) study, the Pt/SNC electrode had a stable electro-oxidation activity with a very good CO tolerance. The Si surface oxide surrounding the Pt nanoparticles on the SNCs was suggested to play a key role in improving the CO tolerance via the bifunctional mechanism.

Original languageEnglish
Pages (from-to)510-514
Number of pages5
JournalJournal of Power Sources
Volume182
Issue number2
DOIs
StatePublished - 1 Aug 2008

Keywords

  • Mass activity
  • Methanol oxidation
  • Pt catalysts
  • Silicon nanocone arrays

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