Methanol Oxidation over TiO_2-modified Multi-walled Carbon Nanotubes Supported Pt-Mo Electrocatalyst  

作　　者：WANG Xiu-yu JIANG Yuan-sheng ZHU Hong ZHANG Jing-chang 

机构地区：[1]Institute of Modern Catalyst, Beoing University of Chemical Technology,Beo＇ing 100029, P. R. China [2]School of Chemistry and Chemical Engineering,Nanjing University, Nanjing 210093, P. R. China

出　　处：《Chemical Research in Chinese Universities》2011年第3期486-489,共4页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.20636060);International Science and Technology Cooperation Program of China(No.2006DFA61240)

摘　　要：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 dio-xide（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@TiO2Pt-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.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 dio-xide（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@TiO2Pt-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.

关 键 词：Methanol oxidation Direct methanol fuel cell Molybdenum oxide PLATINUM 

分 类 号：O643.36[理学—物理化学] TB383[理学—化学]