In-situ fabrication of vertical heterogeneous nickel diselenide-molybdenum diselenide architectures as bifunctional overall water-splitting electrocatalyst  

作　　者：He Zhou Jingrui Hou Limin Zhang Dezhi Kong Hui Wang Longhui Zeng Zhiwei Ren Tingting Xu Ye Wang 

机构地区：[1]Key Laboratory of Material Physics,Ministry of Education,School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450001,China [2]Department of Electrical and Computer Engineering,University of California at San Diego,San Diego,CA 92093,USA [3]Department of Electronic and Information Engineering,The Hong Kong Polytechnic University,Hung Hom,Kowloon 999077,Hong Kong,China

出　　处：《Journal of Materials Science & Technology》2024年第10期256-263,共8页材料科学技术（英文版）

基　　金：Natural Science Foundation of Henan Province(No.222300420542);Educational Department of Henan Province(No.22A140010);National Natural Science Foundation of China(No.12104409);Zhongyuan Youth Talent Support Program of Henan Province(Nos.ZYQR201912152 and ZYQR201912185);China Postdoctoral Science Foundation(No.2019M662509);Basic Cultivation Foundation of Zhengzhou University(No.JC22549020);Start-up Fund for RAPs under the Strategic Hiring Scheme,and the Hong Kong Polytechnic University(BD1H).

摘　　要：Despite the rapid advances in electrocatalysts based on two-dimensional(2D)transition metal dichalco-genides(TMDs)materials,they are subject to serious aggregation,poor conductivity and the presence of inactive basal planes.Herein,we have successfully demonstrated the in-situ construction of NiSe_(2)-MoSe_(2) heterostructure arrays on carbon cloth(NiSe_(2)-MoSe_(2)/CC)by a facile two-step hydrothermal process.The presence of the synergistic effect in the heterostructures effectively optimizes the poor conductivity and hydrophilicity,and thus enables fast electron transfer,leading to enhanced electrochemical reaction.Fur-thermore,density functional theory calculations reveal that the electrons redistribution at the heterojunc-tion interface and the reduced Gibbs free energy of hydrogen adsorption for hydrogen evolution reaction(HER)/the Gibbs free energy change value of rate-determining step for oxygen evolution reaction(OER),thus enhancing the HER/OER catalytic activity.Importantly,the device displays a good performance with a low overpotential of 98 and 310 mV for HER and OER,respectively,and a low cell voltage of 1.59 V for its corresponding electrolyzer(10 mA cm^(-2)).This work presents the high-performance water splitting of bifunctional electrocatalysts based on 2D TMDs materials and offers a novel design concept of interface engineering.

关 键 词：Bifunctional electrocatalyst HETEROSTRUCTURES Hydrogen/oxygen evolution reaction Water splitting Synergistic effect 

分 类 号：TQ116.2[化学工程—无机化工] TQ426