Preparation of heterogeneous NiCo2S4/Ru composite electrode materials and their electrocatalytic properties for hydrogen evolution

doi:10.1039/d2nj01576e

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	Preparation of heterogeneous NiCo2S4/Ru composite electrode materials and their electrocatalytic properties for hydrogen evolution
	Li, XinBao 2; Fu, Han 2; Zhou, Qi 1,2
刊名	NEW JOURNAL OF CHEMISTRY
	2022-06-06
卷号	46 期号:22 页码:10920-10926
关键词	Binary alloysCatalyst activityCobalt alloysDealloyingElectrocatalysisElectrocatalystsElectrodesHydrogenNickel alloysRapid solidification Active areaComposites electrodesElectrocatalyticElectrocatalytic propertiesElectrode materialHydrogen-evolutionNano-porousOverpotentialPerformanceRu composites
ISSN号	1144-0546
DOI	10.1039/d2nj01576e
英文摘要	In order to increase the effective electrochemically active area of electrocatalyst materials and improve their electrocatalytic hydrogen evolution performance, nano-porous Ni-Co alloys were prepared by rapid solidification and dealloying methods. After that, bimetallic sulfides (NiCo2S4) were formed in situ by vapor deposition, then Ru and RuS2 which have excellent intrinsic catalytic activity were adhered to the NiCo2S4 surface by a solvothermal method. Meanwhile, the Ru content was regulated to prepare the NiCo2S4/Ru electrode which was used to figure out the best component and structure for hydrogen evolution. Research shows that when the Ru content reaches 60% (wt/%), the Ru element formed a three-dimensional network flake structure and covered the NiCo2S4 surface. The active area for the reaction (C-dl = 27.6 mF cm(-2)) and electron transfer ability (R-ct = 0.487 omega cm(-2)) were increased because of the formation of the heterostructure and surface modification. At a current density of 50 mA cm(-2), the NiCo2S4/Ru (60%) composite electrode possessed fast HER kinetics with a hydrogen evolution overpotential of 70 mV and a Tafel slope of 76 mV dec(-1), whose electrocatalytic properties are much better than those of NiCo2S4/RuS2 with the same Ru content. The NiCo2S4/Ru (60%) catalyst exhibited superior stability with a small increase in overpotential of just 10 mV after chronopotentiometry tests for 12 h at 10 mA cm(-2).
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000798862200001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158649]
专题	兰州理工大学
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, 287 Langongping Rd, Lanzhou 730050, Peoples R China 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, 287 Langongping Rd, Lanzhou 730050, Peoples R China;
推荐引用方式 GB/T 7714	Li, XinBao,Fu, Han,Zhou, Qi. Preparation of heterogeneous NiCo2S4/Ru composite electrode materials and their electrocatalytic properties for hydrogen evolution[J]. NEW JOURNAL OF CHEMISTRY,2022,46(22):10920-10926.
APA	Li, XinBao,Fu, Han,&Zhou, Qi.(2022).Preparation of heterogeneous NiCo2S4/Ru composite electrode materials and their electrocatalytic properties for hydrogen evolution.NEW JOURNAL OF CHEMISTRY,46(22),10920-10926.
MLA	Li, XinBao,et al."Preparation of heterogeneous NiCo2S4/Ru composite electrode materials and their electrocatalytic properties for hydrogen evolution".NEW JOURNAL OF CHEMISTRY 46.22(2022):10920-10926.