In situ surface-confined fabrication of single atomic Fe-N_(4) on N-doped carbon nanoleaves for oxygen reduction reaction  

作　　者：Xiaojing Jiang Jianian Chen Fenglei Lyu Chen Cheng Qixuan Zhong Xuchun Wang Ayaz Mahsud Liang Zhang Qiao Zhang 

机构地区：[1]Institute of Functional Nano&Soft Materials(FUNSOM),Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices,Soochow University,Suzhou 215123,China

出　　处：《Journal of Energy Chemistry》2021年第8期482-491,I0011,共11页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(21673150,51922073);the Natural Science Foundation of Jiangsu Province(BK20180097);the financial support from the 111 Project;the Collaborative Innovation Center of Suzhou Nano Science and Technology(NANO-CIC);the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)。

摘　　要：Controllable fabrication of Fe-N-C based single-atom catalysts(SACs)for enhanced electrocatalytic performance is highly desirable but still challenging.Here,an in situ surface-confined strategy was demonstrated for the synthesis of single atomic Fe-N_(4))on N-doped carbon nanoleaves(L-FeNC).The in situ generated Zn3[Fe(CN)6]2 could not only serve as a protection layer against collapse of nanoleaves but also provide abundant Fe source for the formation of Fe-N moieties during pyrolysis,leading to high surface area and high graphitization degree of L-FeNC simultaneously.Benefiting from abundant Fe-N_(4))active sites,enhanced mass and charge transfer,the as-prepared L-FeNC manifested a half-wave potential of 0.89 V for oxygen reduction reaction(ORR)in 0.1 M KOH.A maximum power density of 140 m W cm^(-2)and stable discharge voltage even after operation for 50,000 s have been demonstrated when the L-FeNC was used as air cathode for Zn-air battery.This work not only provided a unique surfaceconfined strategy for the synthesis of two-dimensional nanocarbons,but also demonstrated the significant benefit from rational design and engineering of Fe-N-C SACs,thus offering great opportunities for fabrication of efficient energy conversion and storage devices.

关 键 词：Single atom catalyst Iron-nitrogen-carbon Surface confine Oxygen reduction reaction Metal-organic frameworks 

分 类 号：O643.36[理学—物理化学]