Electrocatalytic oxidation of methanol on carbon-nanotubes/graphite electrode modified with platinum and molybdenum oxide nanoparticles

• Published in: Transactions of Nonferrous Metals Society of China Vol. 17; no. 1; pp. 214 - 219
• Main Author: 甘永平 黄辉 张文魁
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 2007; College of Chemical Engineering and Materials Science, Zhejiang University of Technology,Hangzhou 310032, China
• Subjects: carbon nanotubes; fuel cells; methanol oxidation; molybdenum oxides; nanoparticles; 单化学; 氧化反应; 燃料电池; 甲醇; 碳管; fuel cells; molybdenum oxides; methanol oxidation; nanoparticles; carbon nanotubes
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(07)60074-0

Electrochemical codeposition and electrocatalytic properties of platinum and molybdenum oxide nanoparticles （Pt-MoOx） on carbon-nanotubes/graphite electrode for methanol oxidation were investigated. The micrograph and elemental composition of the resulting Pt-MoOx/CNTs/graphite electrode were characterized by scanning electron microscopy（SEM） and energy dispersive X-ray spectroscopy（EDS）. The results show that the Pt-MOOx particles with the average size of about 50 nm are highly dispersed on the CNTs surface. The Pt-MoOx/CNTs/graphite electrode delivers excellent electrocatalytic properties for methanol oxidation. The highest mass activity（Am） reaches 264.8 A/g at the loading mass of 159.3 μg/cm^2. This may be attributed to the small particle size and high dispersion of Pt-MoOx catalysts deposited on the CNTs surface. The kinetic analysis from electrochemical impedance spectroscopy（EIS） reveals that the existed MoOx phase can improve the chemisorptive and catalytic properties for methanol oxidation.