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Vanadium self-intercalated C/V 1.11 S 2 nanosheets with abundant active sites for enhanced electro-catalytic hydrogen evolution
Mingyang Yang1,2; Lujie Cao1,2; Zhenyu Wang2; Yuanju Qu1; Chaoqun Shang2; Hanyu Guo2; Wei Xiong2; Junjun Zhang2; Run Shi2; Jianli Zou2; Chun Cheng2; Hui Pan1,2; Zhouguang Lu2
2019-01-22
Source PublicationElectrochimica Acta
ISSN0013-4686
Volume300Pages:208-216
Abstract

A novel and highly active vanadium self-intercalated C/V1.11S2 nanosheets with abundant active sites are fabricated by a simple hydrothermal-calcinations method. The structures and morphology of C/V1.11S2 nanosheets were characterized by XRD, SEM, XPS and TEM. Particularly, PVP (polyvinylpyrrolidone) was used as surfactant to control the morphology of vanadium sulfide and carbon source to reduce the vanadium sulfide into vanadium self-intercalated V1.11S2 phase with rich active sites. The C/V1.11S2 nanosheets showed an excellent electrocatalytic activity for hydrogen evolution reaction, including a low onset potential of 15 mV vs. RHE (reversible hydrogen electrode), small Tafel slope of 51 mV dec−1, as well as extraordinary catalytic stability. The first-principle calculations further confirmed that the V1.11S2 has a much lower Gibbs free energy for hydrogen adsorption (ΔGH) than that of VS2. The enhanced HER performance can be contributed to the unique vanadium self-intercalated structures, nanostructured morphology and rich sulfur defects of the obtained C/V1.11S2 nanosheets. We believe that the C/V1.11S2 can be used as electrocatalyst in chemical engineering industry and our method provides guidance on the fabrication of other defective transition-metal dichalcogenides to improve their catalytic performances.

KeywordC/v1.11s2nanosheets Electrocatalysts Gibbs Free Energy For Hydrogen Adsorption Hydrogen Evolution Reaction Self-intercalated
DOI10.1016/j.electacta.2019.01.038
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
WOS IDWOS:000458488200026
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Cited Times [WOS]:10   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding AuthorHui Pan; Zhouguang Lu
Affiliation1.Institute of Applied Physics and Materials Engineering, University of Macau, Macao SAR, PR China
2.Shenzhen Key Laboratory of Hydrogen Energy, Department of Materials Science and Engineering, Southern University of Science and Technology,Shenzhen, 518055, Guangdong, PR China
3.Department of Physics and Chemistry, Faculty of Science and Technology, University of Macau, Macao SAR, PR China
First Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Mingyang Yang,Lujie Cao,Zhenyu Wang,et al. Vanadium self-intercalated C/V 1.11 S 2 nanosheets with abundant active sites for enhanced electro-catalytic hydrogen evolution[J]. Electrochimica Acta,2019,300:208-216.
APA Mingyang Yang,Lujie Cao,Zhenyu Wang,Yuanju Qu,Chaoqun Shang,Hanyu Guo,Wei Xiong,Junjun Zhang,Run Shi,Jianli Zou,Chun Cheng,Hui Pan,&Zhouguang Lu.(2019).Vanadium self-intercalated C/V 1.11 S 2 nanosheets with abundant active sites for enhanced electro-catalytic hydrogen evolution.Electrochimica Acta,300,208-216.
MLA Mingyang Yang,et al."Vanadium self-intercalated C/V 1.11 S 2 nanosheets with abundant active sites for enhanced electro-catalytic hydrogen evolution".Electrochimica Acta 300(2019):208-216.
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