Pre-fixing defects in carbon framework for revealing the active sites of oxygen reduction reaction at nitrogen-doped carbon nanotubes

作     者：Bing Huang Kun Hou Yang Liu Rongtao Hu Lunhui Guan Bing Huang;Kun Hou;Yang Liu;Rongtao Hu;Lunhui Guan

作者机构：CAS Key Laboratory of Design and Assembly of Functional NanostructuresFujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002 FujianChina University of Chinese Academy of SciencesBeijing 100049China 

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

年 卷 期：2021年第30卷第12期

页      面：521-527,I0012页

核心收录：

学科分类：0808[工学-电气工程] 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] 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：supported by the National Natural Science Foundation of China(21771184) the FJIRSM&IUE Joint Research Fund(RHZX-2019-002) the STS project(KFJ-STS-QYZD-2021-09-002) 

主　　题：Electrocatalysts Oxygen reduction reaction Defects Nitrogen-doped carbon nanotube 

摘      要：Nitrogen-doped carbon-based materials are promising non-platinum group metal electrocatalysts for the oxygen reduction reaction(ORR).Understanding their ORR active sites is vital for the rational design and development of nitrogen-doped carbon-based electrocatalysts with enhanced catalytic efficiency and ***,the conclusive analysis of the ORR mechanism of nitrogen-doped carbon-based electrocatalysts remains a grand challenge because the catalysts have a complex inhomogeneous ***,we elucidate this problem using nitrogen-doped carbon nanotubes framework catalysts with fixed defect concentrations prepared by pre-thermal treatment at a low *** generation of defects under high-temperature treatment was effectively suppressed to enable a simple model for ORR mechanism study.A correlation between ORR pathways and the different nitrogen species in the nitrogen-doped carbon catalysts was revealed through a combination of structural and electrochemical properties ***,our results also demonstrate the importance of defects for *** believe that the results will provide instructive guidance for designing and developing novel carbon nanomaterials for ORR.