Self-organized nanotubular TiO2 matrix as support for dispersed Pt/Ru nanoparticles: Enhancement of the electrocatalytic oxidation of methanol |
| |
| Authors: | J.M. Macak P.J. Barczuk H. Tsuchiya M.Z. Nowakowska A. Ghicov M. Chojak S. Bauer S. Virtanen P.J. Kulesza P. Schmuki |
| |
| Affiliation: | aDepartment of Materials Science, Institute for Surface Science and Corrosion (LKO), University of Erlangen-Nuremberg, Martenstrasse 7, D-91058 Erlangen, Germany;bDepartment of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warsaw, Poland |
| |
| Abstract: | 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 on 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). |
| |
| Keywords: | Titanium dioxide Nanotubes Bimetallic Pt/Ru nanoparticles Electrocatalysis Methanol oxidation |
| 本文献已被 ScienceDirect 等数据库收录！ |
