A potential-driven switch of activity promotion mode for the oxygen evolution reaction at Co_(3)O_(4)/NiO_(x)H_(y) interface

作     者：Wang Wang Zixu Wang Youcheng Hu Yucheng Liu Shengli Chen Wang Wang;Zixu Wang;Youcheng Hu;Yucheng Liu;Shengli Chen

作者机构：Electrochemical Power Sources Key LaboratoryDepartment of ChemistryWuhan UniversityWuhan430072China Wuhan University Testing CenterWuhan UniversityWuhan430072China 

出 版 物：《eScience》 (电化学与能源科学（英文）)

年 卷 期：2022年第2卷第4期

页      面：438-444页

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：This work was supported by the Natural Science Foundation of China(Grant 21832004) Fundamental Research Funds for the Central Universities(2042021kf1047) China Postdoctoral Science Foundation Funded Project(2021M692470) China National Postdoctoral Program for Innovative Talents(Grant BX20200253).The theoretical calculations have been done on the supercomputing system in the Supercomputing Center of Wuhan University 

主　　题：Oxygen evolution reaction Interface engineering Double exchange interaction Potential-driven switch of mechanism Energetic span 

摘      要：Co_(3)O_(4)spinel oxides have manifested promising activity toward the oxygen evolution reaction(OER)through effective *** them to become top electrocatalysts,however,accurate accounts of the catalytic kinetics are essential to gain a deep understanding of the activity promotion ***,we use a newly proposed kinetic model based on energetic span as the rate-determining term for the electrocatalytic reaction to throw light on the promotion mechanism of Co_(3)O_(4)interfaced with nickel hydroxides(NiO_(x)H_(y))for the *** find that depending on the electrode potential,the OER kinetics at the designed interface between Co_(3)O_(4)and NiO_(x)H_(y)are boosted in entirely different *** a result,the OER can occur at a lower onset potential as well as a low Tafel *** work emphasizes the benefit of using rational theoretical models for electrocatalyst design.