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One stone two birds:Vanadium doping as dual roles in self-reduced Pt clusters and accelerated water splitting
文献摘要:
Integrating active Pt clusters into transition-metal oxides with water-dissociation ability is effective to prepare a bifunctional electrocatalyst for water splitting in alkaline.However,the additional utilization of a reductant and/or the operation at the elevating temperature causes the over-growth and agglomer-ation of Pt clusters,thus losing the high catalytic performance.Herein,we report that V dopant not only favors self-reducing Pt clusters on NiFe layered double hydroxide(LDH)(Pt/NiFeV)at room temperature,but also regulates interfacial charge redistribution to enhance the water-splitting performance.Experimental and theoretical studies reveal that V dopant into NiFe LDH triggers more electrons to trans-fer to adjacent Fe atoms,thus leading to a higher reducing ability compared to that without V-doping.When used as water-splitting electrocatalyst,V doping promotes electron loss of Pt clusters in Pt/NiFeV,optimizing the free energy of hydrogen adsorption and proton recombination kinetics at the cath-ode.Meanwhile,it also moves the d-band center of Ni away from the Fermi level to optimize the adsorp-tion of *OH intermediates and facilitate the desorption of oxygen molecules at the anode.Thereby,Pt/NiFeV exhibits much higher bifunctional performance than V-free Pt/NiFe LDH toward both the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).This work can spark inspiration of design-ing other bifunctional electrocatalysts for energy conversion and storage.
文献关键词:
作者姓名:
Yihan Feng;Zichuang Li;Shanlin Li;Minghui Yang;Ruguang Ma;Jiacheng Wang
作者机构:
State Key Laboratory of High-Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences,Ningbo 315201,Zhejiang,China
文献出处:
引用格式:
[1]Yihan Feng;Zichuang Li;Shanlin Li;Minghui Yang;Ruguang Ma;Jiacheng Wang-.One stone two birds:Vanadium doping as dual roles in self-reduced Pt clusters and accelerated water splitting)[J].能源化学,2022(03):493-501
A类:
NiFeV
B类:
One,stone,two,birds,Vanadium,doping,as,dual,roles,self,reduced,Pt,clusters,accelerated,water,splitting,Integrating,active,into,transition,metal,oxides,dissociation,ability,effective,prepare,bifunctional,alkaline,However,additional,utilization,reductant,operation,elevating,temperature,causes,over,growth,agglomer,thus,losing,catalytic,performance,Herein,report,that,dopant,not,only,favors,reducing,layered,double,hydroxide,LDH,room,also,regulates,interfacial,charge,redistribution,enhance,Experimental,theoretical,studies,reveal,triggers,more,electrons,fer,adjacent,atoms,leading,higher,compared,without,When,used,promotes,loss,optimizing,free,energy,hydrogen,adsorption,proton,recombination,kinetics,cath,Meanwhile,moves,band,center,away,from,Fermi,level,optimize,intermediates,facilitate,desorption,oxygen,molecules,anode,Thereby,exhibits,much,than,toward,both,evolution,reaction,HER,OER,This,work,can,spark,inspiration,design,other,electrocatalysts,conversion,storage
AB值:
0.584317
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