Nanoporous Ni and NiO Prepared by De-alloying as Anodes for Electrocatalytic Oxygen Evolution Reaction

doi:10.11896/cldb.18090290

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	Nanoporous Ni and NiO Prepared by De-alloying as Anodes for Electrocatalytic Oxygen Evolution Reaction
	Zhou, Qi; Ren, Xiangrong
刊名	Cailiao Daobao/Materials Reports
	2019-11-25
卷号	33 期号:11 页码:3701-3707
关键词	Activation energy Alloying Aluminum alloys Anodes Binary alloys Current density Cyclic voltammetry Dealloying Morphology Musculoskeletal system Nickel metallography Nickel oxide Oxygen Oxygen evolution reaction Pore size Rapid quenching Anode material Apparent activation energy Electrocatalytic properties Electrochemical impendence spectroscopies Electrochemical performance Electrolysis of waters Exchange current densities Nano-porous
ISSN号	1005023X
DOI	10.11896/cldb.18090290
英文摘要	Nanoporous Ni was prepared by a combined method of rapid quenching and de-alloying, and then prepared samples were heated to synthesize the nanoporous NiO. The phase, morphology, microstructure and pore-size distribution of nanoporous Ni and NiO were analyzed by XRD, SEM, TEM, BET respectively.The electrochemical performance was investigated by cyclic voltammetry, electrochemical steady-state polarization and electrochemical impendence spectroscopy (EIS). The results showed that nanoporous Ni could be obtained after de-alloying of Ni15Al85 and Ni5Al95 alloy. The bore diameter and skeleton strength of Ni decreased as the Al content increased. Under the current density of 10 mA•cm-2, oxygen evolution reaction overpotential of nanoporous Ni drove from Ni5Al95 alloy was 95 mV lower than nanoporous Ni from Ni15Al85 alloy. However, with the reaction proceeded, collapse and detachment of the surface holes reduced the stability of oxygen evolution. NiO inherited the nanoporous structure of Ni, and further increased the specific surface area and skeleton strength of the electrode. Under the current density of 10 mA•cm-2, oxygen evolution reaction overpotential of nanoporous NiO electrode was only 357 mV, which lower than Ni electrode 14.3 mV. The apparent exchange current density of NiO electrode toward the OER was 1.2 times as high as that of nickel electrode in room temperature, the apparent activation energy reduced 8.59 kJ•mol-1, after 1 000 cycles, overpotential of NiO minished 12 mV (J=100 mA•cm-2), nanoporous NiO drove from Ni5Al95 alloy had superior electrocatalytic properties toward the oxygen evolution reaction and favorable stability. © 2019, Materials Review Magazine. All right reserved.
语种	中文
出版者	Cailiao Daobaoshe/ Materials Review
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150483]
专题	兰州理工大学
作者单位	State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zhou, Qi,Ren, Xiangrong. Nanoporous Ni and NiO Prepared by De-alloying as Anodes for Electrocatalytic Oxygen Evolution Reaction[J]. Cailiao Daobao/Materials Reports,2019,33(11):3701-3707.
APA	Zhou, Qi,&Ren, Xiangrong.(2019).Nanoporous Ni and NiO Prepared by De-alloying as Anodes for Electrocatalytic Oxygen Evolution Reaction.Cailiao Daobao/Materials Reports,33(11),3701-3707.
MLA	Zhou, Qi,et al."Nanoporous Ni and NiO Prepared by De-alloying as Anodes for Electrocatalytic Oxygen Evolution Reaction".Cailiao Daobao/Materials Reports 33.11(2019):3701-3707.