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Mechanistic insights into interfaces and nitrogen vacancies in cobalt hydroxide/tungsten nitride catalysts to enhance alkaline hydrogen evolution

文献类型：期刊论文

作者Liu, Huan1,2,3,6; Wu, Zi-Shan1,3; Huang, Ling1,3; Zhang, Bo-Wei1,3; Yin, Li-Chang4; Xu, Cheng-Yan2,5; Zhen, Liang2,5
刊名JOURNAL OF MATERIALS CHEMISTRY A
出版日期2021-04-12
页码8
ISSN号2050-7488
DOI10.1039/d1ta01560e
通讯作者Yin, Li-Chang(lcyin@imr.ac.cn) ; Xu, Cheng-Yan(cy_xu@hit.edu.cn) ; Zhen, Liang(lzhen@hit.edu.cn)
英文摘要Understanding the limitations of electrocatalytic activity and developing advanced catalysts with enhanced activity are of exceptional importance for future hydrogen energy applications. Due to the complexity of electrolytic hydrogen evolution in alkaline media, there are limited non-noble metal catalysts to afford large scale applications. Tungsten-based catalysts exhibit favorable stability but relatively low activity owing to their strong H* adsorption characteristics. In this work, cobalt hydroxides/cubic phase WN nanoparticles with strengthened interfaces and adjustable nitrogen vacancies anchored on multi-walled carbon nanotubes (Co(OH)(2)/c-WN1-x/CNTs) are exploited as highly efficient alkaline hydrogen evolution electrocatalysts, which exhibit remarkable activity with an overpotential of 78 mV at 10 mA cm(-2) and a low Tafel slope of 43 mV dec(-1) in 1 M KOH media. Density-functional theory calculations revealed that the interfacial combinations of Co(OH)(2)/c-WN1-x were tuned to facilitate the kinetics of hydrogen evolution, where Co(OH)(2) promoted the adsorption of water molecules and the H-OH dissociation, and cubic phase WN with nitrogen vacancies (c-WN1-x) accelerated hydrogen generation by optimizing the hydrogen adsorption free energy.
资助项目National Natural Science Foundation of China[51972312] ; National Natural Science Foundation of China[51472249] ; Shenzhen Science and Technology Innovation Committee[JCYJ20200109113212238] ; China Scholarship Council (CSC)
WOS研究方向Chemistry ; Energy & Fuels ; Materials Science
语种英语
WOS记录号WOS:000644930500001
出版者ROYAL SOC CHEMISTRY
资助机构National Natural Science Foundation of China ; Shenzhen Science and Technology Innovation Committee ; China Scholarship Council (CSC)
源URL[http://ir.imr.ac.cn/handle/321006/162024]  
专题金属研究所_中国科学院金属研究所
通讯作者Yin, Li-Chang; Xu, Cheng-Yan; Zhen, Liang
作者单位1.Yale Univ, Dept Chem, West Haven, CT 06516 USA
2.Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
3.Yale Univ, Energy Sci Inst, West Haven, CT 06516 USA
4.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
5.Harbin Inst Technol, Sch Mat Sci & Engn, Sauvage Lab Smart Mat, Shenzhen 518055, Peoples R China
6.Inner Mongolia Univ Technol, Coll Chem Engn, Hohhot 010051, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Huan,Wu, Zi-Shan,Huang, Ling,et al. Mechanistic insights into interfaces and nitrogen vacancies in cobalt hydroxide/tungsten nitride catalysts to enhance alkaline hydrogen evolution[J]. JOURNAL OF MATERIALS CHEMISTRY A,2021:8.
APA Liu, Huan.,Wu, Zi-Shan.,Huang, Ling.,Zhang, Bo-Wei.,Yin, Li-Chang.,...&Zhen, Liang.(2021).Mechanistic insights into interfaces and nitrogen vacancies in cobalt hydroxide/tungsten nitride catalysts to enhance alkaline hydrogen evolution.JOURNAL OF MATERIALS CHEMISTRY A,8.
MLA Liu, Huan,et al."Mechanistic insights into interfaces and nitrogen vacancies in cobalt hydroxide/tungsten nitride catalysts to enhance alkaline hydrogen evolution".JOURNAL OF MATERIALS CHEMISTRY A (2021):8.

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来源：金属研究所

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