Heterostructures of NiFe LDH hierarchically assembled on MoS_(2) nanosheets as high-efficiency electrocatalysts for overall water splitting  

作　　者：Xiao-Peng Li Li-Rong Zheng Si-Jie Liu Ting Ouyang Siyu Ye Zhao-Qing Liu 

机构地区：[1]School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Guangzhou Key Laboratory for Clean Energy and Materials//Key Laboratory for Water Quality and Conservation of the Pearl River Delta,Ministry of Education,Guangzhou University,Guangzhou 510006,China

出　　处：《Chinese Chemical Letters》2022年第11期4761-4765,共5页中国化学快报（英文版）

基　　金：financially supported by National Natural Science Foundation of China(Nos.21875048 and 21905063);Outstanding Youth Project of Guangdong Natural Science Foundation(No.2020B1515020028);Guangdong Natural Science Foundation(No.2021A1515010066);Science and Technology Research Project of Guangzhou(Nos.201904010052 and 202002010007)。

摘　　要：Typically,rational interfacial engineering can effectively modify the adsorption energy of active hydrogen molecules to improve water splitting efficiency.NiFe layered double hydroxide(NiFe LDH)composite,an efficient oxygen evolution reaction(OER)catalyst,suffers from slow hydrogen evolution reaction(HER)kinetics,restricting its application for overall water splitting.Herein,we construct the hierarchical MoS_(2)/NiFe LDH nanosheets with a heterogeneous interface used for HER and OER.Benefiting the hierarchical heterogeneous interface optimized hydrogen Gibbs free energy,tens of exposed active sites,rapid mass-and charge-transfer processes,the MoS_(2)/NiFe LDH displays a highly efficient synergistic electrocatalytic effect.The MoS_(2)/NiFe LDH electrode in 1 mol/L KOH exhibits excellent HER activity,only 98 mV overpotential at 10 mA/cm^(2).Significantly,when it assembled as anode and cathode for overall water splitting,only 1.61 V cell voltage was required to achieve 10 mA/cm^(2)with excellent durability(50 h).

关 键 词：Transition metal compound ELECTROCATALYSTS Hydrogen evolution reaction Oxygen evolution reaction Overall water splitting 

分 类 号：O643.36[理学—物理化学] TB383.1[理学—化学]