首页|Work-function-induced interfacial electron redistribution of MoO2/WO2 heterostructures for high-efficiency electrocatalytic hydrogen evolution reaction

Work-function-induced interfacial electron redistribution of MoO2/WO2 heterostructures for high-efficiency electrocatalytic hydrogen evolution reaction

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The engineering of the electronic configurations of active sites,together with the production of more accessible active sites through heterostructure design,has been established as a forceful methodology for boosting water electrolysis performance.Herein,a facile approach is developed to fabricate well-dispersed MoO2 and WO2 nanoparticles with abundant heterointerfaces entrapped in N,P-doped carbon nanofibers(referred to as MoO2/WO2@N,P-CNFs hereafter)as hydrogen evolution reaction(HER)electrocatalysts in alkaline and acidic electrolytes.Extensive spectroscopic analyses and theoretical findings manifest that the heterointerface formed by the work function modulation of MoO2/WO2 triggers the sponta-neous electron redistribution from MoO2 to WO2 and a built-in electric field,which is essential to promote water adsorption,optimize the H-intermediate adsorption energy,result in the enhanced charge transfer efficiency,and ulti-mately increase the intrinsic HER activity.Simultaneously,the intimate confinement of MoO2/WO2 heterostructures in the porous carbon substrate can restrain the active sites from unfavorable coarsening and detachment,thus ensur-ing facilitated HER kinetics and outstanding structural robustness.As a result,MoO2/WO2@N,P-CNFs exhibit superior catalytic HER performance in acidic and basic solutions,requiring 118 and 95 mV overpotentials to achieve 10 mA·cm-2,respectively,surpassing a number of reported non-noble metal-based electrocatalysts.This work provides guidelines for the rational design and construction of special metallic heterocomponents with optimized interfacial electronic structure for various electrochemical technologies.

ElectrospinningMoO2/WO2 heterostructureWork functionHydrogen evolution reaction

Tong-Fei Li、Jing Li、Lu-Ping Zhang、Jia-Wei Ke、Meng-Xing Fan、Li-Fang Zhang、Cheng-Wei Deng、Yi Sun、Tao Qian、Cheng-Lin Yan

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School of Chemistry and Chemical Engineering,Nantong University,Nantong 226019,China

Jiangsu Key Laboratory of New Power Batteries,Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials,School of Chemistry and Materials Science,Nanjing Normal University,Nanjing 210023,China

Aerospace Hydrogen Energy Technology(Shanghai)Co.Ltd.,Shanghai 201800,China

Key Laboratory of Core Technology of High Specific Energy Battery and Key Materials for Petroleum and Chemical Industry,College of Energy,Soochow University,Suzhou 215006,China

Light Industry Institute of Electrochemical Power Sources,Suzhou 215006,China

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国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金Distinguished Young Scholars Fund of Jiangsu Province

U21A2033252103226522022755220331412204253BK20220061

2024

10.1007/s12598-023-02516-5

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(2)
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