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

He Zhou ¹Jingrui Hou ¹Limin Zhang ¹Dezhi Kong ¹Hui Wang ¹Longhui Zeng ²Zhiwei Ren ³Tingting Xu ¹Ye Wang¹

扫码查看

作者信息

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
折叠

Abstract

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.

Key words

Bifunctional electrocatalyst/Heterostructures/Hydrogen/oxygen evolution reaction/Water splitting/Synergistic effect

引用本文复制引用

基金项目

Natural Science Foundation of Henan Province(222300420542)

Educational Department of Henan Province(22A140010)

National Natural Science Foundation of China(12104409)

Zhongyuan Youth Talent Support Program of Henan Province(ZYQR201912152)

Zhongyuan Youth Talent Support Program of Henan Province(ZYQR201912185)

China Postdoctoral science Foundation(2019M662509)

Basic Cultivation Foundation of Zhengzhou University(JC22549020)

Startup Fund for RAPs under the Strategic Hiring Scheme,and the Hong Kong Polytechnic University(BD1H)

出版年

2024

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)

CSTPCDCSCD

影响因子：0.657

ISSN：1005-0302

参考文献量62

段落导航