Multi-interface collaboration of graphene cross-linked NiS-NiS_(2)-Ni_(3)S_(4) polymorph foam towards robust hydrogen evolution in alkaline electrolyte

作     者：Haiqing Wang Wenjing Zhang Xiaowei Zhang Shuxian Hu Zhicheng Zhang Weijia Zhou Hong Liu Haiqing Wang;Wenjing Zhang;Xiaowei Zhang;Shuxian Hu;Zhicheng Zhang;Weijia Zhou;Hong Liu

作者机构：Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongInstitute for Advanced Interdisciplinary Research(iAIR)University of JinanJinan250022China Beijing Computational Science Research CenterBeijing100193China Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistrySchool of ScienceTianjin UniversityTianjin300072China State Key Laboratory of Crystal MaterialsShandong UniversityJinan250100China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2021年第14卷第12期

页      面：4857-4864页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：This work was supported by the National Key Research and Development Program of China(No.2017YFB0405400) Shandong Provincial Natural Science Foundation(Nos.ZR2019BB025 and ZR2018ZC0842) the Project of“20 items of University”of Jinan(No.2018GXRC031) the National Natural Science Foundation of China(Nos.21976014,U1930402 and 22071172) the generous computer time from TianHe2-JK Supercomputer Center 

主　　题：hydrogen evolution reaction nickel sulfide interface engineering polymorph heterointerface 

摘      要：Electrocatalytic hydrogen production in alkaline media is extensively adopted in industry. Unfortunately, further performance improvement is severely impeded by the retarded kinetics, which requires the fine regulation of water dissociation, hydrogen recombination, and hydroxyl desorption. Herein, we develop a multi-interface engineering strategy to make an elaborate balance for the alkaline hydrogen evolution reaction (HER) kinetics. The graphene cross-linked three-phase nickel sulfide (NiS-NiS_(2)-Ni_(3)S_(4)) polymorph foam (G-NNNF) was constructed through hydrothermal sulfidation of graphene wrapped nickel foam as a three-dimensional (3D) scaffold template. The G-NNNF exhibits superior catalytic activity toward HER in alkaline electrolyte, which only requires an overpotential of 68 mV to drive 10 mA·cm^(−2) and is better than most of the recently reported metal sulfides catalysts. Density functional theory (DFT) calculations verify the interfaces between nickel sulfides (NiS/NiS_(2)-Ni_(3)S_(4)) and cross-linked graphene can endow the electrocatalyst with preferable hydrogen adsorption as well as metallic nature. In addition, the electron transfer from Ni_(3)S_(4)/NiS_(2) to NiS results in the electron accumulation on NiS and the hole accumulation on Ni_(3)S_(4)/NiS_(2), respectively. The electron accumulation on NiS favors the optimization of the H* adsorption, whereas the hole accumulation on Ni_(3)S_(4) is beneficial for the adsorption of H_(2)O. The work about multi-interface collaboration pushes forward the frontier of excellent polymorph catalysts design.