Ni-B amorphous alloy nanoparticles modified nanoporous Cu toward ethanol oxidation in alkaline medium

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	Ni-B amorphous alloy nanoparticles modified nanoporous Cu toward ethanol oxidation in alkaline medium
	Zhang, Shu-Jin ; Zheng, Yi-Xiong ; Yuan, Lin-Shan ; Zhao, Li-Hua ; Zhao LH(赵莉华) ; Li H(李华)
刊名	http://dx.doi.org/10.1016/j.jpowsour.2013.08.129
	2014
关键词	Alloys Amorphous alloys Chronoamperometry Cyclic voltammetry Diffusion Electrocatalysis Electrochemical electrodes Ethanol Nanoparticles Rate constants Scanning electron microscopy Ultrasonic testing X ray diffraction
英文摘要	Nanoporous Cu (NPC) prepared by dealloying CuZn alloy is used as an economic substrate for the fabrication of Ni-B alloy (Ni-B/NPC) by ultrasonic-assisted electroless technique. The results of scanning electron microscopy (SEM) and X-ray diffraction (XRD) demonstrate the NPC has a bicontinuous network structure and the Ni-B/NPC alloy is amorphous structure with highly dispersed nanoparticles. Electrochemical performances are measured by cyclic voltammetry (CV), chronoamperometry (CA) and linear sweep voltammetry (LSV). The results suggest that the Ni-B/NPC electrode prepared for 5 min shows the highest electrochemical activity and its redox species coverage and proton diffusion coefficient are remarkably improved compared with the bulk Ni. Ethanol oxidation at the Ni-B/NPC electrode suggests the onset oxidation potential has a negative shift of 52 mV and the oxidation peak current increases by 19.4 times, and apparent activation energy decreases 4.75-30.60 kJ mol-1 at the same potential, in comparison with the bulk Ni. Additionally, the reaction rate constant for ethanol oxidation at the Ni-B/NPC electrode is improved by about one order of magnitude relative to the reported value. Finally, the Ni-B/NPC electrode has a stable redox behavior after complete activation and superior catalytic stability for ethanol oxidation. ? 2013 Elsevier B.V. All rights reserved.
语种	英语
出版者	ELSEVIER SCIENCE BV
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/87425]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	Zhang, Shu-Jin,Zheng, Yi-Xiong,Yuan, Lin-Shan,et al. Ni-B amorphous alloy nanoparticles modified nanoporous Cu toward ethanol oxidation in alkaline medium[J]. http://dx.doi.org/10.1016/j.jpowsour.2013.08.129,2014.
APA	Zhang, Shu-Jin,Zheng, Yi-Xiong,Yuan, Lin-Shan,Zhao, Li-Hua,赵莉华,&李华.(2014).Ni-B amorphous alloy nanoparticles modified nanoporous Cu toward ethanol oxidation in alkaline medium.http://dx.doi.org/10.1016/j.jpowsour.2013.08.129.
MLA	Zhang, Shu-Jin,et al."Ni-B amorphous alloy nanoparticles modified nanoporous Cu toward ethanol oxidation in alkaline medium".http://dx.doi.org/10.1016/j.jpowsour.2013.08.129 (2014).