Simultaneously mastering operando strain and reconstruction effects via phase-segregation strategy for enhanced oxygen-evolving electrocatalysis

作     者：Daqin Guan Chenliang Shi Hengyue Xu Yuxing Gu Jian Zhong Yuchen Sha Zhiwei Hu Meng Ni Zongping Shao Daqin Guan;Chenliang Shi;Hengyue Xu;Yuxing Gu;Jian Zhong;Yuchen Sha;Zhiwei Hu;Meng Ni;Zongping Shao

作者机构：State Key Laboratory of Materials-Oriented Chemical EngineeringCollege of Chemical EngineeringNanjing Tech UniversityNanjing 211800JiangsuChina Department of Building and Real EstateResearch Institute for Sustainable Urban Development(RISUD)and Research Institute for Smart Energy(RISE)The Hong Kong Polytechnic UniversityHung HomKowloon 999077Hong KongChina Institute of Biopharmaceutical and Health EngineeringTsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055GuangdongChina Max-Planck-Institute for Chemical Physics of SolidsNöthnitzer Str.40Dresden 01187Germany WA School of Mines:MineralsEnergy and Chemical EngineeringCurtin UniversityPerthWestern Australia 6845Australia 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2023年第82卷第7期

页      面：572-580,I0012页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：funded by the Australian Research Council Discovery Projects(DP160104835,Z.Shao) the Guangdong Basic and Applied Basic Research Foundation(2023A1515012878,D.Guan) the PolyU Distinguished Postdoctoral Fellowship Scheme(1-YWBU,D.Guan) the support from the Max Planck-POSTECH-Hsinchu Center for Complex Phase Materials 

主　　题：Operando strain Structural reconstruction Phase-segregation strategy Operando synergistic effects Oxygen-evolving reaction 

摘      要：Material strain and reconstruction effects are critical for catalysis reactions,but current insights into operando strain effects during reaction and means to master catalyst reconstruction are still ***,we propose a facile thermal-induced phase-segregation strategy to simultaneously master material operando strain and reconstruction effects for enhanced oxygen-evolving reaction(OER).Specifically,self-assembled and controllable layered LiCoO_(2)phase and Co_(3)O_(4)spinel can be generated from pristine Li2Co_(2)O_(4)spinel via Li and O volatilization under different temperatures,realizing controllable proportions of two phases by calcination *** operando and ex-situ characterizations reveal that obvious tensile strain along(003)plane appears on layered LixCoO_(2)phase during OER,while low-valence Co_(3)O_(4)phase transforms into high-valence CoOOHx,realizing simultaneous operando strain and reconstruction *** experimental and computational investigations demonstrate that both strained LixCoO_(2)phase and reconstructed CoOOHxcompound contribute to the beneficial adsorption of important OH-reactants,while respective roles in activity and stability are uncovered by exploring their latticeoxygen participation *** work not only reveals material operando strain effects during OER,but also inaugurates a new thermal-induced phase-segregation strategy to artificially master material operando strain and reconstruction effects,which will enlighten rational material design for many potential reactions and applications.