Synergistic Interlayer and Defect Engineering in VS2 Nanosheets toward Efficient Electrocatalytic Hydrogen Evolution Reaction

Zhang, Junjun1,2,3; Zhang, Chenhui5; Wang, Zhenyu1,2; Zhu, Jian1,2; Wen, Zhiwei1,2; Zhao, Xingzhong3; Zhang, Xixiang5; Xu, Jun4; Lu, Zhouguang1,2

2018-03

10.1002/smll.201703098

Small   影响因子和分区

1613-6810

1613-6829

A simple one-pot solvothermal method is reported to synthesize VS2 nanosheets featuring rich defects and an expanded (001) interlayer spacing as large as 1.00 nm, which is a approximate to 74% expansion as relative to that (0.575 nm) of the pristine counterpart. The interlayer-expanded VS2 nanosheets show extraordinary kinetic metrics for electrocatalytic hydrogen evolution reaction (HER), exhibiting a low overpotential of 43 mV at a geometric current density of 10 mA cm(-2), a small Tafel slope of 36 mV dec(-1), and long-term stability of 60 h without any current fading. The performance is much better than that of the pristine VS2 with a normal interlayer spacing, and even comparable to that of the commercial Pt/C electrocatalyst. The outstanding electrocatalytic activity is attributed to the expanded interlayer distance and the generated rich defects. Increased numbers of exposed active sites and modified electronic structures are achieved, resulting in an optimal free energy of hydrogen adsorption (G(H)) from density functional theory calculations. This work opens up a new door for developing transition-metal dichalcogenide nanosheets as high active HER electrocatalysts by interlayer and defect engineering.

hydrogen evolution reaction interlayer expansion nanosheets transition-metal dichalcogenides VS2

SCI ; EI

英语

第一 ; 通讯

Fundamental Research Funds for the Central Universities[JZ2016HGTB0725]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000426524600007

WILEY-V C H VERLAG GMBH

20181004856105

Defects ; Electrocatalysis ; Electrocatalysts ; Electronic structure ; Free energy ; Gas adsorption ; Nanosheets ; Slope stability ; Transition metals

Roads and Streets:406.2 ; Metallurgy and Metallography:531 ; Thermodynamics:641.1 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Probability Theory:922.1 ; Solid State Physics:933 ; Materials Science:951

Web of Science

1.Southern Univ Sci & Technol, Shenzhen Key Lab Hydrogen Energy, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Hubei, Peoples R China
4.Hefei Univ Technol, Sch Elect Sci & Appl Phys, Hefei 230009, Anhui, Peoples R China
5.King Abdullah Univ Sci & Technol, Phys Sci & Engn Div, Thuwal 239556900, Saudi Arabia

Zhang, Junjun,Zhang, Chenhui,Wang, Zhenyu,et al. Synergistic Interlayer and Defect Engineering in VS2 Nanosheets toward Efficient Electrocatalytic Hydrogen Evolution Reaction[J]. Small,2018,14(9).

Zhang, Junjun.,Zhang, Chenhui.,Wang, Zhenyu.,Zhu, Jian.,Wen, Zhiwei.,...&Lu, Zhouguang.(2018).Synergistic Interlayer and Defect Engineering in VS2 Nanosheets toward Efficient Electrocatalytic Hydrogen Evolution Reaction.Small,14(9).

Zhang, Junjun,et al."Synergistic Interlayer and Defect Engineering in VS2 Nanosheets toward Efficient Electrocatalytic Hydrogen Evolution Reaction".Small 14.9(2018).