Atomically precise M-N-C electrocatalysts for oxygen reduction:Effects of inter-site distance,metal-metal interaction,coordination environment,and spin states  

作　　者：Junfeng Huang Saira Ajmal Anuj Kumar Jianwen Guo Mohammed Mujahid Alam Abdullah G.Al-Sehemi Ghulam Yasin 

机构地区：[1]School of Mechanical Engineering,Dongguan University of Technology,Dongguan 523808,Guangdong,China [2]Nano-Technology Research Laboratory,Department of Chemistry,GLA University,Mathura,Uttar Pradesh 281406,India [3]Department of Chemistry,College of Science,King Khalid University,Abha 61413,Saudi Arabia [4]School of Environmental Science and Engineering,Tianjin University,Tianjin 300350,China [5]State Key Laboratory of Chemical Resource Engineering,College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China

出　　处：《Journal of Energy Chemistry》2025年第2期132-155,I0004,共25页能源化学(英文版)

基　　金：supported by the Research Fund for International Scientists(RFIS-Grant numbers:52150410410);National Natural Science Foundation of China;the Deanship of Scientific Research and Graduate Studies at King Khalid University for funding this research work through Large Research Project under the grant number RGP2/121/1445.

摘　　要：Inspired by molecular catalysts,researchers developed atomically precise nitrogen-coordinated single or dual metal sites imbedded in graphitized carbon(M-N-C)to fully utilize metallic sites for 02activation.These catalysts performed remarkably well in the electrocatalytic oxygen reduction reaction(ORR)due to their distinct coordination and electrical structures,Nonetheless,their maximum efficacy in practical applications has yet to be achieved.This agenda identifies tailoring the coordination environment,spin states,intersite distance,and metal-metal interaction as innovative approaches to regulate the ORR performance of these catalysts.However,it is necessary to undertake a precise assessment of these methodologies and the knowledge obtained to be implemented in the design of future M-N-C catalysts for ORR.Therefore,this review aims to analyze recent progress in M-N-C ORR catalysts,emphasizing their innovative engineering with aspects such as alteration in intersite distance,metal-metal interaction,coordination environment,and spin states.Additionally,we critically discuss how to logically monitor the atomic structure,local coordination,spin,and electronic states of M-N-C catalysts to modulate their ORR activity.We have also highlighted the challenges associated with M-N-C catalysts and proposed suggestions for their future design and fabrication.

关 键 词：ELECTROCATALYSIS M-N-C electrocatalysts ORR Activity descriptors Spin states 

分 类 号：O643.36[理学—物理化学]