Electrocatalytic activity of Pt nanoparticles deposited on porous TiO2 supports toward methanol oxidation

Chung Shou Chen, Fu-Ming Pan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

95 Scopus citations

Abstract

Porous TiO2 thin films were prepared on the Si substrate by hydrothermal method, and used as the Pt electrocatalyst support for methanol oxidation study. Well-dispersed Pt nanoparticles with a particle size of 5-7 nm were pulse-electrodeposited on the porous TiO2 support, which was mainly composed of the anatase phase after an annealing at 600 °C in vacuum. Cyclic voltammetry (CV) and CO stripping measurements showed that the Pt/TiO2 electrode had a high electrocatalytic activity toward methanol oxidation and an excellent CO tolerance. The excellent electrocatalytic performance of the electrode is ascribed to the synergistic effect of Pt nanoparticles and the porous TiO2 support on CO oxidation. The strong electronic interaction between Pt and the TiO2 support may modify CO chemisorption properties on Pt nanoparticles, thereby facilitating CO oxidation on Pt nanoparticles via the bifunctional mechanism and thus improving the electrocatalytic activity of the Pt catalyst toward methanol oxidation.

Original languageEnglish
Pages (from-to)663-669
Number of pages7
JournalApplied Catalysis B: Environmental
Volume91
Issue number3-4
DOIs
StatePublished - 28 Sep 2009

Keywords

  • CO oxidation
  • Hydrothermal method
  • Methanol electro-oxidation
  • Platinum
  • Porous TiO

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