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

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

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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 NiSe2-MoSe2 heterostructure arrays on carbon cloth(NiSe2-MoSe2/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.

Bifunctional electrocatalystHeterostructuresHydrogen/oxygen evolution reactionWater splittingSynergistic effect

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

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Key Laboratory of Material Physics,Ministry of Education,School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450001,China

Department of Electrical and Computer Engineering,University of California at San Diego,San Diego,CA 92093,USA

Department of Electronic and Information Engineering,The Hong Kong Polytechnic University,Hung Hom,Kowloon 999077,Hong Kong,China

Natural Science Foundation of Henan ProvinceEducational Department of Henan ProvinceNational Natural Science Foundation of ChinaZhongyuan Youth Talent Support Program of Henan ProvinceZhongyuan Youth Talent Support Program of Henan ProvinceChina Postdoctoral science FoundationBasic Cultivation Foundation of Zhengzhou UniversityStartup Fund for RAPs under the Strategic Hiring Scheme,and the Hong Kong Polytechnic University

22230042054222A14001012104409ZYQR201912152ZYQR2019121852019M662509JC22549020BD1H

2024

10.1016/j.jmst.2023.09.010

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.177(10)
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