Methanol Oxidation over TiO2-modified Multi-walled Carbon Nanotubes Supported Pt-Mo Electrocatalyst

Chemical Research in Chinese Universities ›› 2011, Vol. 27 ›› Issue (3): 486-489.

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Methanol Oxidation over TiO2-modified Multi-walled Carbon Nanotubes Supported Pt-Mo Electrocatalyst

WANG Xiu-yu¹, JIANG Yuan-sheng², ZHU Hong¹ and ZHANG Jing-chang^1*

1. Institute of Modern Catalyst, Beijing University of Chemical Technology, Beijing 100029, P. R. China;
2. School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China

Received:2010-06-13 Revised:2010-10-23 Online:2011-05-25 Published:2011-04-29
Contact: ZHANG Jing-chang E-mail:zhangjc1@mail.buct.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(No.20636060) and International Science and Technology Cooperation Program of China(No.2006DFA61240).

Abstract

Abstract: In order to develop a novel and high-performance catalytic material for direct methanol fuel cells(DMFC), molybdenum oxide as a co-catalyst with Pt on multi-walled carbon nanotubes which were modified by titanium dioxide(denoted as CNTs@TiO2) was investigated. The physicochemical characterizations of the catalysts were carried out via X-ray diffraction(XRD), transmission electron microscopy(TEM) and X-ray photoelectron spectroscopy(XPS). Cyclic voltammetry(CV) showed that the CO-tolerance performance increased in the sequence of Pt/CNTs< Pt/CNTs@TiO2<Pt-Mo/CNTs@TiO2. The improved CO-tolerance performance of the Pt-Mo/CNTs@TiO2 catalyst can be attributed to the combined beneficial effects of highly dispersed Pt nanoparticles on the CNTs, the existence of oxygen holes in the MoO3 layer structure and the oxidation capability of TiO2.

Key words: Methanol oxidation, Direct methanol fuel cell, Molybdenum oxide, Platinum

WANG Xiu-yu, JIANG Yuan-sheng, ZHU Hong and ZHANG Jing-chang*. Methanol Oxidation over TiO2-modified Multi-walled Carbon Nanotubes Supported Pt-Mo Electrocatalyst[J]. Chemical Research in Chinese Universities, 2011, 27(3): 486-489.

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Methanol Oxidation over TiO2-modified Multi-walled Carbon Nanotubes Supported Pt-Mo Electrocatalyst

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