文献类型：期刊文献

英文题名：Mesoporous and dual-shelled hollow CeO2@CoNC nanospheres as efficient and stable oxygen reduction reaction electrocatalysts

作者：Su, Zixiang[1];Wei, Hehe[1];Zhang, Longtao[1];Li, Hui[1];Liu, Ping[2,3];Hou, Zhenshan[1];Gong, Xueqing[1]

机构：[1]East China Univ Sci & Technol, Ctr Computat Chem & Res Inst Ind Catalysis, State Key Lab Green Chem Engn & Ind Catalysis, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Nanjing Univ Posts & Telecommun, Sch Sci, Nanjing 210023, Peoples R China;[3]Nanjing Univ Posts & Telecommun, New Energy Technol Engn Lab Jiangsu Prov, Nanjing 210023, Peoples R China

年份：2023

卷号：468

外文期刊名：ELECTROCHIMICA ACTA

收录：;EI(收录号：20233914776261);WOS:【SCI-EXPANDED(收录号:WOS:001145787600001)】；

基金：This study was supported by the National Key R & D Program of China (2021YFA1500700) , National Nature Science Foundation of China (22102057, 22203030, 21825301, 92045303, 12104235) and Shanghai Sailing Program (21YF1409400) . The authors thank Research Center of Analysis and Test of East China University of Science and Technology and Feringa Nobel Prize Scientist Joint Research Center for the characterizations.

语种：英文

外文关键词：Dual-shelled hollow structure; CeO 2-based electrocatalysts; M-N-C; Oxygen reduction reaction; Energy storage

摘要：The electrocatalytic oxygen reduction reaction (ORR) is the key bottleneck of fuel cells and rechargeable metal air batteries, and recently, metal-nitrogen complex carbon (M-N-C) demonstrates great potential in these fields. However, the complex and easily degraded M-N-C structure often results in inferior activity and poor durability in electrolysis. Herein, we fabricate a catalyst of h-CeO2@CoNC through the extended Sto center dot ber method and subsequent pyrolysis, involving the hollow CeO2 as the core and Co-N-C as the shell. The h-CeO2@CoNC catalyst exhibits notable ORR catalytic performances in 0.1 M KOH with a half-wave potential of 0.82 V and excellent durability, attributed to the synergistic interaction between CeO2 and Co-N-C matrix. Specifically, the inner layer of CeO2 is principally responsible for enhancing the chemical stability and the outer one of Co-N-C matrix is beneficial to boosting the ORR catalytic activity. This work provides an efficient preparation approach and further insight of rational design of the unique M-N-C catalysts for energy storage.