Oxygen vacancies engineering by coordinating oxygen-buffering CeO_(2) with CoO_(x) nanorods as efficient bifunctional oxygen electrode electrocatalyst

作     者：Haihong Zhong Luis Alberto Estudillo-Wong Yuan Gao Yongjun Feng Nicolas Alonso-Vante Haihong Zhong;Luis Alberto Estudillo-Wong;Yuan Gao;Yongjun Feng;Nicolas Alonso-Vante

作者机构：State Key Laboratory of Chemical Resource EngineeringBeijing Engineering Center for Hierarchical CatalystsCollege of ChemistryBeijing University of Chemical TechnologyNo.15 Beisanhuan East Road100029 BeijingChina IC2MPUMR-CNRS 7285University of PoitiersF-86022 Poitiers CedexFrance Departamento de Sociedad y Política AmbientalCIIEMADInstituto Politécnico NacionalCalle 30 de junio de 1520Alcaldía GAMC.P.07340 CDMXMexico Anqing Research InstituteBeijing University of Chemical TechnologyNo.8 Huanhu West RoadHigh-Tech DistrictAnqing 24600China 

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

年 卷 期：2021年第30卷第8期

页      面：615-625,I0013页

核心收录：

学科分类：0808[工学-电气工程] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Key R&D Program of China(No.2016YFB0301600) the National Natural Science Foundation of China,the Fundamental Research Funds for the Central Universities(JD1716,12060093063) the Programme XU Guangqi(Code Projet:45644RC) the financial support from the China Scholarship Council 

主　　题：Co3O4 CeO_(2) Oxygen vacancies ORR OER 

摘      要：CeO_(2)decorated CoOx rod-like hybrid,supported onto holey reduced graphene(CoOx/CeO_(2)/RGO)composite,was fabricated via a surfactant-assisted *** corresponding electrocatalytic performance towards oxygen reduction/evolution reactions(ORR and OER)was systematically investigated in alkaline ***,morphological and compositional studies revealed changes in electronic and surface properties when CeO_(2)was introduced as an oxygen buffer *** oxygen vacancies effectively enhanced the electrocatalytic activity,while the synergistic effect of co-catalyst CeO_(2),CoOx activecenters,and defective graphene with many voids facilitate the charge/mass transfer,making CoOx/CeO_(2)/RGO an efficient and stable bifunctional electrocatalyst for OER/ORR with△E=0.76 V(△E=E10mAcm.-2OER-E_(1/2).ORR).This parameter is 70 mV and 270 mV lower than CoOx/RGO and the benchmark Pt/C,*** addition,the OER/ORR bifunctionality of CoOx/CeO_(2)/RGO composite outperforms that of Pt/C catalyst in a H2-O_(2)micro fuel cell platform.