Author/Authors :
Xu, Baomin Department of Materials Science and Engineering - Southern University of Science and Technology - Shenzhen - Guangdong 518055, China , Li, Xiangnan Department of Materials Science and Engineering - Southern University of Science and Technology - Shenzhen - Guangdong 518055, China , He, Liqing Department of Materials Science and Engineering - Southern University of Science and Technology - Shenzhen - Guangdong 518055, China , Zhong, Xiongwei Department of Materials Science and Engineering - Southern University of Science and Technology - Shenzhen - Guangdong 518055, China , Zhang,Jie Department of Materials Science and Engineering - Southern University of Science and Technology - Shenzhen - Guangdong 518055, China , Luo, Shijing Department of Materials Science and Engineering - Southern University of Science and Technology - Shenzhen - Guangdong 518055, China , Yi, Wendi Department of Materials Science and Engineering - Southern University of Science and Technology - Shenzhen - Guangdong 518055, China , Zhang, Luozheng Department of Materials Science and Engineering - Southern University of Science and Technology - Shenzhen - Guangdong 518055, China , Hu, Manman Department of Materials Science and Engineering - Southern University of Science and Technology - Shenzhen - Guangdong 518055, China , Tang, Jun Department of Materials Science and Engineering - Southern University of Science and Technology - Shenzhen - Guangdong 518055, China , Zhou, Xianyong Department of Materials Science and Engineering - Southern University of Science and Technology - Shenzhen - Guangdong 518055, China , Zhao, Xingzhong Department of Physics - Wuhan University - Wuhan - Hubei 430072, China
Abstract :
Exploringearth-abundantandcost-effectivecatalystswithhighactivityandstabilityforahydrogenevolutionreaction(HER)isofgreatimportancetopracticalapplicationsofalkalinewaterelectrolysis.Here,wereportonA-siteBa2+-deficiencydopingasaneffectivestrategytoenhancetheelectrochemicalactivityofBaCo0.4Fe0.4Zr0.1Y0.1O3−δforHER,whichisrelatedtotheformationofoxygenvacanciesaroundactiveCo/Feions.BycomparisonwiththebenchmarkingBa0.5Sr0.5Co0.8Fe0.2O3−δ,oneofthemostspotlightedperovskiteoxides,theBa0.95Co0.4Fe0.4Zr0.1Y0.1O3−δoxidehasloweroverpotentialandsmallerTafelslope.Furthermore,theBa0.95Co0.4Fe0.4Zr0.1Y0.1O3−δcatalystisultrastableinanalkalinesolution.TheenhancedHERperformanceoriginatedfromtheincreasedactiveatomsadjacenttooxygenvacanciesonthesurfaceoftheBa0.95Co0.4Fe0.4Zr0.1Y0.1O3−δcatalystinducedbyBa2+-deficiencydoping.Thelow-coordinatedactiveatomsandadjacentoxygenionsmayplaytheroleofheterojunctionsthatsynergisticallyfacilitatetheVolmerprocessandthusrenderstimulatedHERcatalyticactivity.ThepreliminaryresultssuggestthatBa2+-deficiencydopingisafeasiblemethodtotailorthephysicalandelectrochemicalpropertiesofperovskite,andthatBa0.95Co0.4Fe0.4Zr0.1Y0.1O3−δisapotentialcatalystforHER
Keywords :
Evaluation , A-Site Ba2+-DeficientBa1−xCo0.4Fe0.4Zr0.1Y0.1O3−δOxides , Electrocatalysts , Efficient Hydrogen Evolution Reaction , HER
