Work-function-induced interfacial electron redistribution of MoO_(2)/WO_(2) heterostructures for high-efficiency electrocatalytic hydrogen evolution reaction  

作　　者：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 

机构地区：[1]School of Chemistry and Chemical Engineering,Nantong University,Nantong,226019,China [2]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 [3]Aerospace Hydrogen Energy Technology(Shanghai)Co.Ltd.,Shanghai,201800,China [4]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 [5]Light Industry Institute of Electrochemical Power Sources,Suzhou,215006,China

出　　处：《Rare Metals》2024年第2期489-499,共11页稀有金属（英文版）

基　　金：This study was financially supported by the National Natural Science Foundation of China(Nos.U21A20332,52103226,52202275,52203314 and 12204253);the Distinguished Young Scholars Fund of Jiangsu Province(No.BK20220061).

摘　　要：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 MoO_(2) and WO_(2) nanoparticles with abundant heterointerfaces entrapped in N,P-doped carbon nanofibers(referred to as MoO_(2)/WO_(2)@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 MoO_(2)/WO_(2) triggers the spontaneous electron redistribution from MoO_(2)to WO_(2) 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 ultimately increase the intrinsic HER activity.Simultaneously,the intimate confinement of MoO_(2)/WO_(2) heterostructures in the porous carbon substrate can restrain the active sites from unfavorable coarsening and detachment,thus ensuring facilitated HER kinetics and outstanding structural robustness.As a result,MoO_(2)/WO_(2)@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.

关 键 词：Electrospinning MoO_(2)/WO_(2) heterostructure Work function Hydrogen evolution reaction 

分 类 号：TQ116.2[化学工程—无机化工] TQ426