Fabrication of nanoporous Ni and NiO via a dealloying strategy for water oxidation catalysis

doi:10.1016/j.jechem.2020.03.020

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	Fabrication of nanoporous Ni and NiO via a dealloying strategy for water oxidation catalysis
	Ren, Xiangrong 1,2,3; Zhai, Yiyue 2; Zhou, Qi 1,3; Yan, Junqing 2; Liu, Shengzhong 2
刊名	Journal of Energy Chemistry
	2020-11-01
卷号	50 页码:125-134
关键词	Activation energy Aluminum alloys Binary alloys Catalysts Dealloying Potassium hydroxide Precious metals Rapid solidification Reaction rates Apparent activation energy Chemical dealloying High specific surface area Long term stability Metal-based catalysts Nanoporous structures Oxygen evolution reaction (oer) Pseudocapacitive behavior
ISSN号	20954956
DOI	10.1016/j.jechem.2020.03.020
英文摘要	Nickel oxides and (oxy)hydroxides are promising replacements for noble-metal-based catalysts owing to their high activity and good long-term stability for the oxygen evolution reaction (OER). Herein, we developed nanoporous Ni by a method of combined rapid solidification and chemical dealloying. Subsequently, nanoporous NiO was obtained via heating treatment, the macropore and skeleton sizes of the NiO originated from Ni10Al90 alloy are 100–300 nm and 80–200 nm, respectively. Benefiting from the multi-stage nanoporous structure and high specific surface area, the nanoporous NiO demonstrates an outstanding OER, reaching 20 mA cm−2 at an overpotential of 356 mV in 1 M KOH. The corresponding Tafel slope and apparent activation energy are measured to be 76.73 mV dec−1 and 29.0 kJ mol−1, respectively. Moreover, kinetic analysis indicates that the NiO catalyst shows pseudocapacitive characteristics, and the improved current is attributed to the high-rate pseudocapacitive behavior that efficiently maintains increased nickel redox cycling to accelerate the reaction rates. After 1000 cycles of voltammetry, the overpotential of the NiO decreases by 22 mV (j = 10 mA cm−2), exhibiting excellent stability and durability. © 2020
WOS研究方向	Chemistry ; Energy & Fuels ; Engineering
语种	英语
出版者	Elsevier B.V., Netherlands
WOS记录号	WOS:000569401000001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/151018]
专题	兰州理工大学
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China; 2.Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an; Shaanxi; 710119, China; 3.Materials Science and Engineering College, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China
推荐引用方式 GB/T 7714	Ren, Xiangrong,Zhai, Yiyue,Zhou, Qi,et al. Fabrication of nanoporous Ni and NiO via a dealloying strategy for water oxidation catalysis[J]. Journal of Energy Chemistry,2020,50:125-134.
APA	Ren, Xiangrong,Zhai, Yiyue,Zhou, Qi,Yan, Junqing,&Liu, Shengzhong.(2020).Fabrication of nanoporous Ni and NiO via a dealloying strategy for water oxidation catalysis.Journal of Energy Chemistry,50,125-134.
MLA	Ren, Xiangrong,et al."Fabrication of nanoporous Ni and NiO via a dealloying strategy for water oxidation catalysis".Journal of Energy Chemistry 50(2020):125-134.