H-D kinetic isotope effects of alcohol electrooxidation on Au, Pd and Pt electrodes in alkaline solutions

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	H-D kinetic isotope effects of alcohol electrooxidation on Au, Pd and Pt electrodes in alkaline solutions
	Ren, Jie ; Yang, Yao-Yue ; Zhang, Bin-Wei ; Tian, Na ; Cai, Wen-Bin ; Zhou, Zhi-You ; Sun, Shi-Gang ; Tian N(田娜) ; Zhou ZY(周志有) ; Sun SG(孙世刚)
刊名	http://dx.doi.org/10.1016/j.elecom.2013.10.009
	2013
关键词	ELECTROCATALYTIC OXIDATION ELECTROCHEMICAL OXIDATION MASS-SPECTROMETRY GOLD SPECTROSCOPY CATALYSIS MECHANISM PLATINUM
英文摘要	Major State Basic Research Development Program of China [2012CB215500]; NSFC [21073152, 21073045, 21222310, 21021002]; Fundamental Research Funds for the Central Universities [2012121019]; Program for New Century Excellent Talents in University [NECT-11-0301]; The identification of rate-determining step (RDS) is vital for understanding reaction mechanisms and designing advanced catalysts. Here, we systemically studied the H-D kinetic isotope effects (KIEs) on electrooxidation of ethanol, isopropanol, and ethylene glycol (EG) on Au, Pd and Pt electrodes in alkaline solution by combining cyclic voltammety and in situ FUR spectroscopy. Large primary KIEs are observed on Au electrode: 8.4 for ethanol, 62 for EG and 7.9 for isopropanol when alpha-H of alcohols are substituted by deuterium, but much lower KIEs (<3.2) were observed on Pt, and the values on Pd are between Au and Pt. According to the criteria (KIEs = 6-10) for C-H (D) breaking/forming as RDS, we conclude that the cleavage of the a-H from C-H bond is the RDS for alcohol electrooxidation on Au, but not on Pt. On Pd, the RDS depends on the structure of alcohols. The difference can be rationally correlated with the binding affinity of hydrogen on precious metal surfaces. (C) 2013 Elsevier B.V. All rights reserved.
语种	英语
出版者	ELSEVIER SCIENCE INC
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/88721]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Ren, Jie,Yang, Yao-Yue,Zhang, Bin-Wei,et al. H-D kinetic isotope effects of alcohol electrooxidation on Au, Pd and Pt electrodes in alkaline solutions[J]. http://dx.doi.org/10.1016/j.elecom.2013.10.009,2013.
APA	Ren, Jie.,Yang, Yao-Yue.,Zhang, Bin-Wei.,Tian, Na.,Cai, Wen-Bin.,...&孙世刚.(2013).H-D kinetic isotope effects of alcohol electrooxidation on Au, Pd and Pt electrodes in alkaline solutions.http://dx.doi.org/10.1016/j.elecom.2013.10.009.
MLA	Ren, Jie,et al."H-D kinetic isotope effects of alcohol electrooxidation on Au, Pd and Pt electrodes in alkaline solutions".http://dx.doi.org/10.1016/j.elecom.2013.10.009 (2013).