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Highly improved electrocatalytic activity of NiSx: Effects of Cr-doping and phase transition
Dong Liu1; Rui Tong1; Yuanju Qu2; Qing Zhu1; Xiongwei Zhong3; Mingliang Fang3; Kin Ho Lo4; Feifei Zhang5; Yinchao Ye5; Yuxing Tang1; Shi Chen1; Guichuang Xing1; Hui Pan1,6
2020-06-15
Source PublicationApplied Catalysis B: Environmental
ISSN0926-3373
Volume267Pages:118721
Abstract

Hydrogen evolution reaction (HER) is a vital step for electrochemical energy conversion technologies. However, developing cost-efficient electrocatalysts remains a huge challenge. Here, we report that Cr-doped NiS (Cr-NiS) in situ grown on Ni foam via a hydrothermal sulfurization reaction can be an ultra-highly efficient and low-cost electrocatalyst for HER in alkaline condition. We find that the Cr-doping can trigger the formation of NiS and NiS, leading to the suppression of NiS in the nanostructure. We show that Cr-NiS exhibits an excellent HER activity with an ultralow overpotential of 81 mV at 10 mA cm, better than those of most nickel sulfide catalysts, and good stability. Our combined experimental and computational study reveals that the excellent performance is contributed by: (1) stabilized NiS phase, (2) strongly improved conductivity, (3) greatly enhanced active sites, and (4) reduced Gibbs free energy for hydrogen adsorption (ΔG) due to the Cr-doping. We believe that this work provides a simple approach to design cost-effective and ultra-highly efficient HER electrocatalysts for practical applications.

KeywordCr-doped Nisx Electrocatalyst First Priciples Calculation Hydrogen Evolution Reaction Phase Tranisition
DOI10.1016/j.apcatb.2020.118721
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaChemistry ; Engineering
WOS SubjectChemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
WOS IDWOS:000518865300033
PublisherELSEVIER, RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS
Scopus ID2-s2.0-85078996874
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Cited Times [WOS]:39   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding AuthorShi Chen; Guichuang Xing; Hui Pan
Affiliation1.Joint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macau,Macao SAR,China
2.School of Electronic and Information Engineering,Foshan University,Foshan,528000,China
3.Shenzhen Key Laboratory of Polymer Science and Technology,College of Materials Science and Engineering,Shenzhen University,Shenzhen,518060,China
4.Department of Electromechanical Engineering,Faculty of Science and Technology,University of Macau,Macao SAR,China
5.Macau Pooi To Middle School,Macao SAR,China
6.Department of Physics and Chemistry,Faculty of Science and Technology,University of Macau,Macao SAR,China
First Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING;  Faculty of Science and Technology
Recommended Citation
GB/T 7714
Dong Liu,Rui Tong,Yuanju Qu,et al. Highly improved electrocatalytic activity of NiSx: Effects of Cr-doping and phase transition[J]. Applied Catalysis B: Environmental,2020,267:118721.
APA Dong Liu,Rui Tong,Yuanju Qu,Qing Zhu,Xiongwei Zhong,Mingliang Fang,Kin Ho Lo,Feifei Zhang,Yinchao Ye,Yuxing Tang,Shi Chen,Guichuang Xing,&Hui Pan.(2020).Highly improved electrocatalytic activity of NiSx: Effects of Cr-doping and phase transition.Applied Catalysis B: Environmental,267,118721.
MLA Dong Liu,et al."Highly improved electrocatalytic activity of NiSx: Effects of Cr-doping and phase transition".Applied Catalysis B: Environmental 267(2020):118721.
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