Synergistic Interlayer and Defect Engineering in VS2 Nanosheets toward Efficient Electrocatalytic Hydrogen Evolution Reaction
KAUST DepartmentMaterial Science and Engineering Program
Physical Science and Engineering (PSE) Division
Online Publication Date2017-12-27
Print Publication Date2018-03
Permanent link to this recordhttp://hdl.handle.net/10754/626739
MetadataShow full item record
AbstractA 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 ≈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 (∆GH ) 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.
CitationZhang J, Zhang C, Wang Z, Zhu J, Wen Z, et al. (2017) Synergistic Interlayer and Defect Engineering in VS2 Nanosheets toward Efficient Electrocatalytic Hydrogen Evolution Reaction. Small: 1703098. Available: http://dx.doi.org/10.1002/smll.201703098.
SponsorsThis work was financially supported by the National Natural Science Foundation of China (No. 21671096), the Shenzhen Key Laboratory Project (No. ZDSYS201603311013489), the Natural Science Foundation of Shenzhen (Nos. JCYJ20170412153139454, JCYJ20150630145302231, JCYJ20150331101823677), and the Fundamental Research Funds for the Central Universities (No. JZ2016HGTB0725).
- Composition and Interface Engineering of Alloyed MoS2 x Se2(1- x ) Nanotubes for Enhanced Hydrogen Evolution Reaction Activity.
- Authors: Zhang J, Wu MH, Shi ZT, Jiang M, Jian WJ, Xiao Z, Li J, Lee CS, Xu J
- Issue date: 2016 Aug
- Nanoscale engineering and Mo-doping of 2D ultrathin ReS<sub>2</sub> nanosheets for remarkable electrocatalytic hydrogen generation.
- Authors: Xu J, Fang C, Zhu Z, Wang J, Yu B, Zhang J
- Issue date: 2020 Aug 20
- Efficiently Synergistic Hydrogen Evolution Realized by Trace Amount of Pt-Decorated Defect-Rich SnS<sub>2</sub> Nanosheets.
- Authors: Liu G, Qiu Y, Wang Z, Zhang J, Chen X, Dai M, Jia D, Zhou Y, Li Z, Hu P
- Issue date: 2017 Nov 1
- Synergistic Effect of MoS<sub>2</sub> Nanosheets and VS<sub>2</sub> for the Hydrogen Evolution Reaction with Enhanced Humidity-Sensing Performance.
- Authors: Chen X, Yu K, Shen Y, Feng Y, Zhu Z
- Issue date: 2017 Dec 6
- Nickel@Nitrogen-Doped Carbon@MoS<sub>2</sub> Nanosheets: An Efficient Electrocatalyst for Hydrogen Evolution Reaction.
- Authors: Shah SA, Shen X, Xie M, Zhu G, Ji Z, Zhou H, Xu K, Yue X, Yuan A, Zhu J, Chen Y
- Issue date: 2019 Mar