Electro-functionalized 2D nitrogen-carbon nanosheets decorated with symbiotic cobalt single-atoms/clusters  

作　　者：Xinyan Zhou Sifan Qiao Zhenzhen Zhao Meiqi Liu Kexin Song Fuxi Liu Nailin Yue Xiujuan Li Meng Zou Wei Zhang 

机构地区：[1]Key Laboratory of Automobile Materials MOE,and School of Materials Science&Engineering,and Electron Microscopy Center,and International Center of Future Science,and Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials,Jilin University,Changchun 130012,Jilin,China [2]Key Laboratory of Bionic Engineering,Ministry of Education,Jilin University,Changchun 130025,jilin,China

出　　处：《Journal of Energy Chemistry》2025年第2期385-391,I0008,共8页能源化学(英文版)

基　　金：supported by the National Natural Science Foundation of China(51872115 and 12234018);Beijing Synchrotron Radiation Facility(BSRF)4B9A.

摘　　要：Two-dimensional(2D)materials loaded with single atoms and clusters are being set at the forefront of catalysis due to their distinctive geometric and electronic features.However,the usually-complicated synthesis procedures impede in-depth clarification of their catalytic mechanisms.To this end,herein we developed an efficient one-step dimension-reduction carbonization strategy,with which we successfully architected a highly-efficient catalyst for oxygen reduction reaction(ORR),featured with symbiotic cobalt single atoms and clusters decorated in two-dimensional(2D)ultra-thin(3.5 nm thickness)nitrogen-carbon nanosheets.The synergistic effects of the two components afford excellent oxygen reduction activity in alkaline media(E_(1/2)=0.823 V vs.RHE)and thereof a high power density(146.61 mW cm^(-2))in an assembled Zn-air battery.As revealed by theoretical calculations,the cobalt clusters can regulate electrons surrounding those individual atoms and affect the adsorption of intermediate species.As a consequence,the derived active sites of single cobalt atoms lead to a significant improvement of the ORR performance.Thus,our work may fuel interests to delicate architectu re of single atoms and clusters coexisting 2D support toward optimal electrocatalytic performance.

关 键 词：Singleatoms and clusters Two-dimensional NANOSHEETS Carbon-Nitrogen Oxygen reduction reaction 

分 类 号：O643.36[理学—物理化学] TB383.1[理学—化学]