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Mechanistic insights into interfaces and nitrogen vacancies in cobalt hydroxide/tungsten nitride catalysts to enhance alkaline hydrogen evolution
Liu, Huan1,2,3,6; Wu, Zi-Shan2,3; Huang, Ling2,3; Zhang, Bo-Wei2,3; Yin, Li-Chang4; Xu, Cheng-Yan1,5; Zhen, Liang1,5
Corresponding AuthorYin, Li-Chang(lcyin@imr.ac.cn) ; Xu, Cheng-Yan(cy_xu@hit.edu.cn) ; Zhen, Liang(lzhen@hit.edu.cn)
2021-04-12
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
Pages8
AbstractUnderstanding 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.
Funding OrganizationNational Natural Science Foundation of China ; Shenzhen Science and Technology Innovation Committee ; China Scholarship Council (CSC)
DOI10.1039/d1ta01560e
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaChemistry ; Energy & Fuels ; Materials Science
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS IDWOS:000644930500001
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/162025
Collection中国科学院金属研究所
Corresponding AuthorYin, Li-Chang; Xu, Cheng-Yan; Zhen, Liang
Affiliation1.Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
2.Yale Univ, Dept Chem, West Haven, CT 06516 USA
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
Recommended Citation
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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