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中国化学会第28届学术年会

作者： ping wu,yingdan qian,zhang hui,cai chenxin jiangsu key laboratory of new power batteries,jiangsu key laboratory of biofunctional materials,college of chemistry and materials science,nanjing normal university,nanjing 210097,p.r.china

＜正＞Modulating the electronic characteristics of graphene is of great technological importance for improving and expanding its applications.1,2Chemical doping with other elements is a promising way to achieve this *... 详细信息

关键词： Carbon materials biotechnology electrocatalysis nitrogen-doped graphene hydrogen peroxide

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

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rare Metals 2024年第2期43卷 489-499页

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 School of chemistry and Chemical Engineering Nantong UniversityNantong226019China jiangsu key laboratory of new power batteries Jiangsu Collaborative Innovation Centre of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing210023China Aerospace Hydrogen Energy Technology(Shanghai)Co.Ltd. Shanghai201800China key laboratory of Core Technology of High Specific Energy Battery and key materials for petroleum and Chemical Industry College of EnergySoochow UniversitySuzhou215006China Light Industry Institute of Electrochemical power Sources Suzhou215006China

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 ***,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 *** 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 ***,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 *** 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 *** 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

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