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Pt nanoparticles supported on submicrometer-sized TiO2 spheres for effective methanol and ethanol oxidation

Authors
Journal
Electrochimica Acta
0013-4686
Publisher
Elsevier
Publication Date
Volume
105
Identifiers
DOI: 10.1016/j.electacta.2013.05.002
Keywords
  • Titanium Dioxide
  • Submicrometer-Sized Sphere
  • Platinum Catalyst
  • Electrooxidation
  • Proton-Exchange Membrane Fuel Cell
Disciplines
  • Chemistry

Abstract

Abstract High electrocatalytic activity for alcohol electrooxidation by Pt nanoparticles supported on submicrometer-sized TiO2 spheres is achieved. The Pt nanoparticles with a diameter of 8–20nm are uniformly coated on the surface of the submicrometer-sized TiO2 spheres with a diameter of 370–500nm via a simple wet chemical synthesis. The electrocatalytic performances of the Pt/TiO2 submicrometer-sized TiO2 spheres for methanol and ethanol in acidic and alkaline media are investigated systematically by electrochemical methods. Compared with the Pt catalyst supported on the commercial carbon black, the Pt/TiO2 spheres exhibit an excellent enhanced electrocatalytic activity and stability owing to the mesoporous active sites, synergistic effect of Pt/TiO2, and micro-channels for liquid diffusion and gaseous product to escape.

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