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	Studies of Oxidation Processes of Methanol on Hollow CoPt Nanospheres and In situ Electrochemical Fourier Transform Infrared Spectroscopy
	Zhou Xin-Wen ; Gan Ya-Li ; Sun Shi-Gang ; Sun SG(孙世刚)
	2012-09
关键词	Hollow CoPt nanosphere Dealloying process Methanol oxidation In situ electrochemical FTIR spectroscopy Fuel cell
英文摘要	Hollow CoPt nanospheres were synthesized by chemical reduction and galvanic displacement reactions. The catalyst showed good electrocatalytic activity for methanol oxidation. The results of transmission electron microscopy (TEM), energy dispersive spectromenter (EDS), and electrochemical cyclic voltammograms indicated that, in the process of electrochemical experiments carried in 0.1 mol . L-1 H2SO4 and 0.1 mol . L-1 CH3OH, hollow CoPt nanospheres were dealloying, which induced the dissolution of elemental Co from the surface of the catalyst. After the dealloying process, more Pt active sites were exposed on the surface of the catalyst and the catalyst showed better catalytic activity, as well as enhanced structural stability. The electrooxidation of methanol on the hollow CoPt nanospheres was studied on the molecular level using in situ electrochemical Fourier transform infrared (FTIR) spectroscopy. The toxic intermediate CO observed on the CoPt nanorods displayed abnormal infrared effects (AIREs). The FTIR results were similar to those obtained in an earlier experiment on the hollow CoPt nanospheres using CO as a probe molecule. All the results suggested that the dealloying method would be a useful technique for regulating the composition and performance of the catalyst. In situ electrochemical FTIR was highlighted as a potential method for studying the oxidation processes of organic molecules. It is envisaged that these methods will be widely used in the field of fuel cell research.; National Natural Science Foundation of China [20833005]
语种	英语
出版者	PEKING UNIV PRESS
内容类型	期刊论文
源URL	[http://dx.doi.org/10.3866/PKU.WHXB201205031]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Zhou Xin-Wen,Gan Ya-Li,Sun Shi-Gang,et al. Studies of Oxidation Processes of Methanol on Hollow CoPt Nanospheres and In situ Electrochemical Fourier Transform Infrared Spectroscopy[J],2012.
APA	Zhou Xin-Wen,Gan Ya-Li,Sun Shi-Gang,&孙世刚.(2012).Studies of Oxidation Processes of Methanol on Hollow CoPt Nanospheres and In situ Electrochemical Fourier Transform Infrared Spectroscopy..
MLA	Zhou Xin-Wen,et al."Studies of Oxidation Processes of Methanol on Hollow CoPt Nanospheres and In situ Electrochemical Fourier Transform Infrared Spectroscopy".(2012).

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