Tandem catalysis of Cu/Ni multi-sites promotes oxygen reduction reaction

作     者：Bin-Bin Feng Ke-Ke Chang Wan-Feng Xiong Duan-Hui Si Shui-Ying Gao Hong-Fang Li Rong Cao 冯彬彬;常可可;熊晚枫;司端惠;高水英;李红芳;曹荣

作者机构：College of Chemistry and Materials ScienceFujian Normal UniversityFuzhou350007China State Key Laboratory of Structural ChemistryFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of ChinaFuzhou350108China University of Chinese Academy of SciencesBeijing100049China 

基　　金：supported by the National Key Research and Development Program of China(2021YFA1501500 and 2018YFA0704502) the National Natural Science Foundation of China(22171265,22201286,22033008 and 22220102005) Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China(2021ZZ103) the Open Research Fund of CNMGE Platform&NSCC-TJ the Open Science Promotion Plan 2023 of CSTCloud 

出 版 物：《Science China Materials》 (中国科学（材料科学）（英文版）)

年 卷 期：2024年第67卷第9期

页      码：2934-2940页

摘      要：The special electronic characteristics and high atom usage efficiency of metal-nitrogen-carbon(M-N-C)materials have made them extremely attractive for oxygen reduction reactions(ORRs).However,it is inevitable that hydrogen peroxide(H_(2)O_(2))will be formed via the two-electron pathway in ***,the Cu nanoparticles(NPs)have been encapsulated into Ni doped hollow mesoporous carbon spheres(Ni-HMCS)to reduce the generation of H_(2)O_(2)in *** tests confirm that the introduction of Cu NPs improves the ORR performance *** obtained Cu/Ni-HMCS exhibits a half-wave potential of 0.82 V *** hydrogen electrode and a limited current density of 5.5 mA cm^(-2),which is comparable with the commercial Pt/***,Cu/Ni-HMCS has been used in Zn-air battery,demonstrating a high power density of 161 mW cm^(-2)and a long-term recharge capability(50 h at 5 mA cm^(-2)).The theoretical calculation proposes a tandem catalysis pathway for Cu/Ni multi-sites catalysis,that is,H_(2)O_(2)released from the Ni-N_(4)and Cu-N_(4)sites migrates to the Cu(111)face,on which the captive H_(2)O_(2)is further reduced to H_(2)*** work demonstrates an interesting tandem catalytic pathway of dual-metal multi-sites for ORR,which provides an insight into the development of effective fuel cell electrocatalysts.

主 题 词：oxygen reduction reaction tandem catalysis pathway dual-metal multi-sites Cu nanoparticles 

学科分类：081704[081704] 07[理学] 070304[070304] 08[工学] 0817[工学-轻工类] 0805[工学-能源动力学] 0703[理学-化学类] 

核心收录：

D　O　I：10.1007/s40843-024-2952-2

馆 藏 号：203130894...