Bifunctional oxygen electrode cobalt–nickel sulfides catalysts originated from intercalated LDH precursors

作     者：Xiaofei Gong Haihong Zhong Luis Alberto Estudillo-Wong Nicolas Alonso-Vante Yongjun Feng Dianqing Li Xiaofei Gong;Haihong Zhong;Luis Alberto Estudillo-Wong;Nicolas Alonso-Vante;Yongjun Feng;Dianqing Li

作者机构：State Key Laboratory of Chemical Resource EngineeringBeijing Engineering Center for Hierarchical CatalystsCollege of ChemistryBeijing University of Chemical TechnologyBeijing 100029China Departamento de Sociedad y Política AmbientalCIIEMADInstituto Politécnico NacionalCalle 30 de junio de 1520Alcaldía GAMC.P.07340 CDMXMexico IC2MPUMR-CNRS 7285University of PoitiersF-86073 Poitiers CedexFrance 

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

年 卷 期：2022年第31卷第11期

页      面：376-386,I0010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：the support by the Fundamental Research Funds for the Central Universities(ZY2117) financial support from the European Union(ERDF)‘Région Nouvelle Aquitaine’ the financial support from the projects CIIEMAD-SIP-IPN No.20196152 and20220825Y financial support from the Joint Funds of the National Natural Science Foundation of China(ZK20180055) Programs for Foreign Talent(G2021106012L) 

主　　题：Bimetallic sulfides Confinement synthesis LDHs ORR OER 

摘      要：Bimetallic cobalt-nickel sulfide nanoparticles anchored on S-,N-codoped holey carbon nanosheets(CoNiS-T@NCFs)with a hydrangea-like morphology,were synthesized via a confinement synthesis route,in which an intercalated LDH precursor was subjected to the interlayer-confined carbonization and host-layer *** phase transformation and structure evolution(e.g.,atom site occupancy,crystallite size,and cell volume)of the CoNi-S-T@NCFs electrocatalysts,as a function of sulfurization temperatures,were confirmed by X-ray diffraction and Rietveld *** sulfur vacancies effectively enhance the electrocatalytic activity,while the synergistic effect of(Co,Ni)7 S8 alloy and S,N-codoped carbon matrix facilitates the electron transfer and accelerates reaction kinetics,making CoNi-S-900@NCFs an efficient and stable bifunctional electrocatalyst for oxygen reduction reaction(ORR).The rich highvalence Co(Ⅲ)and Ni(Ⅲ)of CoNi-S-900@NCFs facilitates the in-situ transformation of the metal(oxy)hydroxides intermediates with high catalytic activity for oxygen evolution reaction(OER).Thus,with a bifunctional parameter,ΔE,of 0.75 V(E_(j=10,OER)-E_(1/2,ORR)),this electrocatalyst slightly outperforms the state-of-the-art commercial Pt/C+RuO_(2)/C catalyst(ΔE=0.76 V)in alkaline *** work demonstrates the influence that the sulfurization temperature has on the relationship between the structure and electrocatalytic performance of bimetallic sulfides prepared by the synthesis strategy using the intercalated LDH *** strategy can be extended to prepare other chalcogenides with binary or ternary transition metals.