標題: Electrocatalytic activity of Pt nanoparticles deposited on porous TiO(2) supports toward methanol oxidation
作者: Chen, Chung-Shou
Pan, Fu-Ming
材料科學與工程學系
Department of Materials Science and Engineering
公開日期: 28-Sep-2009
摘要: Porous TiO(2) 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 TiO(2) 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/TiO(2) 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 TiO(2) support on CO oxidation. The strong electronic interaction between Pt and the TiO(2) 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.
URI: http://dx.doi.org/10.1016/j.apcatb.2009.07.008
http://hdl.handle.net/11536/6655
ISSN: 0926-3373
DOI: 10.1016/j.apcatb.2009.07.008
期刊: APPLIED CATALYSIS B-ENVIRONMENTAL
Volume: 91
Issue: 3-4
起始頁: 663
結束頁: 669
Appears in Collections:Articles