Electrochemical deposition of Au-Pt alloy particles with cauliflower-like microstructures for electrocatalytic methanol oxidation

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	Electrochemical deposition of Au-Pt alloy particles with cauliflower-like microstructures for electrocatalytic methanol oxidation
	Ye, Weichun 1,2; Kou, Huanhuan 1,2; Liu, Qinze 3; Yan JF(严俊峰)3; Zhou F(周峰)3 ; Wang, Chunming 1,2
刊名	International Journal of Hydrogen Energy
	2012
卷号	37 期号:5 页码:4088-4097
关键词	Electrochemical deposition Au-Pt alloys Cauliflower-like microstructures Methanol electro-oxidation Electronic effect
ISSN号	0360-3199
通讯作者	Ye, Weichun ; Wang, Chunming
英文摘要	Au–Pt alloy particles with cauliflower-like microstructures of varying Pt/Au ratios were electrodeposited on indium tin oxide (ITO) substrates by constant potential electrolysis at E = −0.25 V. The results of X-ray diffraction and X-ray photoelectron spectroscopy confirm that the bimetallic alloys can be obtained for different Pt/Au ratios including 4/1, 1/1 and 1/4. The formation of alloyed cauliflower-like microstructures may be the result of the fast formation of gold seeds as the core and subsequent simultaneous deposition of Au and Pt from cyclic voltammetric study. The effect of surface composition of Au–Pt alloy particles on electrocatalytic methanol oxidation were investigated in H₂SO₄ solution. The electrocatalytic abilities including electrochemical surface area, peak current density and the turnover number of methanol oxidation follow the order of Pt₄Au₁ > Pt > Pt₁Au₁. The results can be ascribed to that electronic effect may be prominent while bifunctional effect is insignificant for Au–Pt alloy systems because the electrocatalytic activity of Au is negligible in acidic media. Additionally, the Pt₄Au₁ electrode has superior kinetics of methanol electro-oxidation than monometallic Pt electrode by calculating the electron transfer coefficient (α).
学科主题	材料科学与物理化学
收录类别	SCI
资助信息	the Natural Science Foundation of Gansu Province, China (No. 1107RJZA261);the Fundamental Research Funds for the Central Universities (No. lzujbky-2011–25)
语种	英语
WOS记录号	WOS:000301615200014
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/19322]
专题	兰州化学物理研究所_固体润滑国家重点实验室
作者单位	1.Lanzhou Univ, Dept Chem, Lanzhou 730000, Gansu, Peoples R China 2.Key Lab Nonferrous Met Chem & Resources Utilizat, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Ye, Weichun,Kou, Huanhuan,Liu, Qinze,et al. Electrochemical deposition of Au-Pt alloy particles with cauliflower-like microstructures for electrocatalytic methanol oxidation[J]. International Journal of Hydrogen Energy,2012,37(5):4088-4097.
APA	Ye, Weichun,Kou, Huanhuan,Liu, Qinze,Yan JF,Zhou F,&Wang, Chunming.(2012).Electrochemical deposition of Au-Pt alloy particles with cauliflower-like microstructures for electrocatalytic methanol oxidation.International Journal of Hydrogen Energy,37(5),4088-4097.
MLA	Ye, Weichun,et al."Electrochemical deposition of Au-Pt alloy particles with cauliflower-like microstructures for electrocatalytic methanol oxidation".International Journal of Hydrogen Energy 37.5(2012):4088-4097.