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Edge reconstruction of layer-dependentβ-in2se3/mos2 vertical heterostructures for accelerated hydrogen evolution

Nano Research 2023年第1期16卷 1670-1678页

作者： Gonglei Shao Meiqing Yang Haiyan Xiang Song Luo Xiong-Xiong Xue Huimin Li Xu Zhang Song Liu Zhen Zhou Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education School of Chemical EngineeringZhengzhou UniversityZhengzhou 450001China Institute of Chemical Biology and Nanomedicine(ICBN) State Key Laboratory of Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China College of Life and Environmental Science Hunan University of Arts and ScienceChangde 415000China School of Physics and Optoelectronics Xiangtan UniversityXiangtan 411105China Institute of New Energy Material Chemistry School of Materials Science and EngineeringNankai UniversityTianjin 300350China

The layer-dependent properties are still unclarified in two-dimensional(2D)vertical *** this study,we layer-bylayer deposited semimetalβ-in2se3 on monolayer mos2 to form verticalβ-in2se3/mos2 heterostructures by chemical vapor *** defect-mediated nucleation mechanism inducesβ-in2se3 nanosheets to grow on monolayer mos2,and the layer number of stackedβ-in2se3 can be precisely regulated from 1 layer(L)to 13 L by prolonging the growth ***β-in2se3/mos2 heterostructures reveal tunable type-Ⅱband alignment arrangement by altering the layer number ofβ-in2se3,which optimizes the internal electron ***,the edge atomic structure ofβ-in2se3 stacking on monolayer mos2 shows the reconstruction derived from large lattice mismatch(~29%),and the presence ofβ-in2se3 also further increases the electrical conductivity ofβ-in2se3/mos2 *** to abundant layer-dependent edge active sites,edge reconstruction,improved hydrophilicity,and high electrical conductivity ofβ-in2se3/mos2 heterostructures,the edge ofβ-in2se3/mos2 heterostructures exhibits excellent electrocatalytic hydrogen evolution *** onset potential and smaller Tafel slope can be observed at the edge of monolayer mos2 coupled with 13-Lβ-***,the outstanding conductive layers coupled with edge reconstruction in 2D vertical heterostructures play decisive roles in the optimization of electron energy levels and improvement of layer-dependent catalytic performance.

关键词： in2se3/mos2 heterostructure edge reconstruction layer dependent hydrogen evolution reaction microreactor

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