Ultra-small Co/CoO_(x) nanoparticles dispersed on N-doped carbon nanosheets for highly efficient electrocatalytic oxygen evolution reaction

作     者：Chen Chen Zhuojun Yang Wei Liang Hao Yan Yongxiao Tuo Yanpeng Li Yan Zhou Jun Zhang Chen Chen;Zhuojun Yang;Wei Liang;Hao Yan;Yongxiao Tuo;Yanpeng Li;Yan Zhou;Jun Zhang

作者机构：College of Materials Science and EngineeringChina University of Petroleum(East China)Qingdao 266580ShandongChina College of Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580ShandongChina 

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

年 卷 期：2021年第30卷第4期

页      面：345-354页

核心收录：

学科分类：081702[工学-化学工艺] 081705[工学-工业催化] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：partially supported by the National Natural Science Foundation of China(No.21805308) the Taishan Scholar Project of Shandong province,the Key Research and Development Program of Shandong Province(No.2019GSF109075) the Fundamental Research Funds for the Central Universities(No.18CX06065A,No.19CX05001A) 

主　　题：Co/CoO_(x)nanoparticle Metal-organic framework In-situ annealing Nitrogen-doped porous carbon Oxygen evolution reaction Electrocatalysis 

摘      要：In this paper,we report a facile strategy to synthesize Co-BDC-NH2 material,which is used as a precursor towards an excellent OER electrocatalyst by thermal annealing in ***-small Co/Co Oxnanoparticles were uniformly dispersed on the rhombus N-doped carbon(NC)*** electron microscopic,X-ray diffraction spectrometric,and X-ray photoelectron spectroscopic analyses revealed the coexistence of metallic Co and Co oxides *** was found that Co/CoO_(x)@NC obtained at 500℃ annealing temperature exhibited the highest electrocatalytic OER activity,with 307 and375 m V overpotential to achieve 10 and 100 m A cm^(-2) current ***,thanks to the in-situ annealing process,Co/CoO_(x)@NC showed excellent catalytic stability with 97.4%current density retention after 24 h electrolysis at 1.66 V *** electrode *** investigations revealed that the ultrasmall Co/Co Oxnanoparticles distributed on N-doped carbon template contribute significantly towards OER electrocatalysis through enlarging the activity surface areas and enhancing the intrinsic electrochemical activity due to the presence of metallic Co.