期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 7, 期 12, 页码 1417-1422出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2005.09.031
关键词
titanium dioxide; nanotubes; bimetallic Pt/Ru nanoparticles; electrocatalysis; methanol oxidation
We explore oxidative electrocatalytic properties of a system consisting of bimetallic Pt/Ru nanoparticles dispersed over a nanotubular self-organized TiO2 matrix. The nanotubular TiO2 layers consist of individual tubes of 100 nm diameter, 500 nm length and 15 nm wall thickness. This nanotubular TiO2 support provides a high surface area and it significantly enhances the electrocatalytic activity of Pt/Ru for methanol oxidation (relative to the performance of Pt/Ru at the same loading but immobilized oil a conventional compact TiO2 support). Annealed to anatase, the TiO2 nanotubular support exhibits even higher enhancement effect during electrooxidation of methanol than when used in the as-formed amorphous structure. The overall electrocatalytic activity of the system can be further increased by illumination with UV-light (wavelength 325 nm). (c) 2005 Elsevier B.V. All rights reserved.
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