Electrocatalytic activity of Pt nanoparticles deposited on porous TiO2 supports toward methanol oxidation

被引：107

作者：

Chen, Chung-Shou ^{[1
]}

Pan, Fu-Ming ^{[1
]}

机构：

[1] Natl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu 30010, Taiwan

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2009年 / 91卷 / 3-4期

关键词：

Porous TiO2; Platinum; Hydrothermal method; CO oxidation; Methanol electro-oxidation; PT-RU; CARBON NANOTUBES; PARTICLE-SIZE; FUEL-CELLS; PLATINUM; CATALYSTS; CO; ELECTROOXIDATION; ELECTRODES; UHV;

D O I：

10.1016/j.apcatb.2009.07.008

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Porous TiO2 thin films were prepared on the Si substrate by hydrothermal method, and used as the Pt electrocatalyst support for methanol oxidation study. Well-dispersed Pt nanoparticles with a particle size of 5-7 nm were pulse-electrodeposited on the porous TiO2 support, which was mainly composed of the anatase phase after an annealing at 600 degrees C in vacuum. Cyclic voltammetry (CV) and CO stripping measurements showed that the Pt/TiO2 electrode had a high electrocatalytic activity toward methanol oxidation and an excellent CO tolerance. The excellent electrocatalytic performance of the electrode is ascribed to the synergistic effect of Pt nanoparticles and the porous TiO2 support on CO oxidation. The strong electronic interaction between Pt and the TiO2 support may modify CO chemisorption properties on Pt nanoparticles, thereby facilitating CO oxidation on Pt nanoparticles via the bifunctional mechanism and thus improving the electrocatalytic activity of the Pt catalyst toward methanol oxidation. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：663 / 669

页数：7

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