Chem. J. Chinese Universities

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Effect of SnO2-TiO2 Film Support on Electrocatalytic Properties of Au-Pt Nanoparticles

YU Zhi-Hui, XIE Jia, XIA Ding-Guo*   

  1. College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
  • Received:2007-11-12 Revised:1900-01-01 Online:2008-06-10 Published:2008-06-10
  • Contact: XIA Ding-Guo

Abstract: SnO2-TiO2 thin films were deposited on the activated glassy carbon electrodes by vacuum coating method. Au-Pt/SnO2-TiO2/GC composite electrode was prepared by reducing HAuCl4 and H2PtCl6 mixture solution and sediment Au-Pt bimetallic nanoparticles successively on the SnO2-TiO2/GC.The effect of SnO2-TiO2 film support on the electrocatalytic properties of Au-Pt nanoparticles was characterized via cyclic voltograme method. The morphological and structural properties of Au-Pt nanoparticles self-assembled on SnO2-TiO2 film were characterized via Scanning Electron Microscope and X-ray Photoelectron Spectroscopy. The results show that the compact and uniformed 10 nm Au-Pt nanoparticles were self-assembled on SnO2-TiO2 film. The ability of anti-CO poisoning was enhanced with the function of SnO2-TiO2 support. The form of Au-Pt alloy enhanced the electrocatalytic oxidation of methanol in acidic system. Furthermore, the increase of d vacancy with the function of SnO2-TiO2 support improved the stability and catalytic property of Au-Pt bimetallic nanoparticles.

Key words: Au-Pt nanoparticles, SnO2-TiO2 film, Anti-CO poisoning, Oxidation of methanol

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