Vanadium-doping in interlayer-expanded MoS(2)nanosheets for the efficient electrocatalytic hydrogen evolution reaction

Liu, Tong1; Fang, Changji1; Yu, Bansui1; You, Yu1; Niu, Haihong2; Zhou, Ru2; Zhang, Junjun3,4; Xu, Jun1

2020-07-07

10.1039/d0qi00135j

Inorganic Chemistry Frontiers   影响因子和分区

2052-1553

Two-dimensional layered MoS(2)nanosheets are regarded as a promising catalyst for electrocatalytic hydrogen generation but suffer from limitations of catalytically inert basal planes and poor intrinsic conductivity. In this work, we report a simple hydrothermal method to synthesize defect-rich MoS(2)nanosheets featuring vanadium (V) doping, widely expanded interlayer spacings, and a high content of metallic 1T-phase towards the efficient hydrogen evolution reaction (HER). The structural characteristics of V(iv)&V(ii) co-doping, mixed 1T&2H phases and wide interlayer expansion endow the nanosheets with plentiful disorders and rich defects, thereby resulting in abundant active sites. Furthermore, V(iv)&V(ii) co-doping brings in electronic benefits of a narrowed bandgap, improved intrinsic conductivity and optimized hydrogen adsorption free energy of basal planes. By tuning the V dopant content, the 10%V-MoS(2)catalyst shows an optimized HER performance with a low overpotential of 146 mV at 10 mA cm(-2)and a small Tafel slope of 48 mV dec(-1), and a long operational stability of 80 h. Our work opens up new opportunities for improving the electrochemical HER performance of layered transition metal dichalcogenides (TMDs) by synergistic structural and compositional modulations.

SCI ; EI

英语

通讯

National Natural Science Foundation of China[51972092][51802145] ; Natural Science Foundation of Anhui Province[1908085ME118] ; Fundamental Research Funds for the Central Universities[PA2018GDQT0009] ; Key Project of Natural Science Research in Anhui Colleges[KJ2020A0123] ; Basic Research Project of the Science and Technology Innovation Commission of Shenzhen[JCYJ20190809115413414]

Chemistry

Chemistry, Inorganic & Nuclear

WOS:000544485000006

ROYAL SOC CHEMISTRY

20204109316401

Defects ; Gas adsorption ; Electrocatalysis ; Hydrogen production ; Layered semiconductors ; Slope stability ; Transition metals ; Vanadium compounds ; Catalysts ; Free energy ; Molybdenum compounds

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Web of Science

1.Hefei Univ Technol, Sch Elect Sci & Appl Phys, Hefei 230009, Peoples R China
2.Hefei Univ Technol, Sch Elect Engn & Automat, Hefei 230009, Peoples R China
3.Hefei Normal Univ, Sch Phys & Mat Engn, Hefei 230601, Peoples R China
4.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

Liu, Tong,Fang, Changji,Yu, Bansui,et al. Vanadium-doping in interlayer-expanded MoS(2)nanosheets for the efficient electrocatalytic hydrogen evolution reaction[J]. Inorganic Chemistry Frontiers,2020,7(13):2497-2505.

Liu, Tong.,Fang, Changji.,Yu, Bansui.,You, Yu.,Niu, Haihong.,...&Xu, Jun.(2020).Vanadium-doping in interlayer-expanded MoS(2)nanosheets for the efficient electrocatalytic hydrogen evolution reaction.Inorganic Chemistry Frontiers,7(13),2497-2505.

Liu, Tong,et al."Vanadium-doping in interlayer-expanded MoS(2)nanosheets for the efficient electrocatalytic hydrogen evolution reaction".Inorganic Chemistry Frontiers 7.13(2020):2497-2505.