Self-organized nanotubular TiO2 matrix as support for dispersed Pt/Ru nanoparticles:: Enhancement of the electrocatalytic oxidation of methanol

被引：229

作者：

Macak, JM

Barczuk, PJ

Tsuchiya, H

Nowakowska, MZ

Ghicov, A

Chojak, M

Bauer, S

Virtanen, S

Kulesza, PJ

Schmuki, P

机构：

[1] Univ Erlangen Nurnberg, Inst Surface Sci & Corros LKO, Dept Mat Sci, D-91058 Erlangen, Germany

[2] Univ Warsaw, Dept Chem, PL-02093 Warsaw, Poland

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2005年 / 7卷 / 12期

关键词：

titanium dioxide; nanotubes; bimetallic Pt/Ru nanoparticles; electrocatalysis; methanol oxidation;

D O I：

10.1016/j.elecom.2005.09.031

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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.

引用

页码：1417 / 1422

页数：6

共 54 条

[1]

[Anonymous], J NEW MAT ELECTROCHE

[2] Electronic alterations caused by ruthenium in Pt-Ru alloy nanoparticles as revealed by electrochemical NMR [J].