Porous carbon materials doped with atomically dispersed metal sites(ADMSs)are promising electrocatalysts for oxygen reduction reaction(ORR)electrocatalysis.In this work,we fabricated hierarchical porous nitrogen-doped...Porous carbon materials doped with atomically dispersed metal sites(ADMSs)are promising electrocatalysts for oxygen reduction reaction(ORR)electrocatalysis.In this work,we fabricated hierarchical porous nitrogen-doped carbon nanofibers with atomically dispersed Fe-N4 sites by carbonization of electrospinning iron-based metal-organic frameworks(MOFs)/polyacrylonitrile nanofibers for ORR electrocatalysis.Remarkably,the re sultant carbon nanofibers with atomically dispersed FeN4 sites exhibit extraordinary electrochemical performance with an onset potential of 0.994 V and a halfwave potential of 0.876 V in alkaline electrolyte,comparable to the benchmark commercial Pt/C catalyst.The high catalytic performance is originated from the unique hierarchically porous 1 D carbon structure and abundant highly active atomically dispersed Fe-N4 sites.展开更多
基金supported by the National Natural Science Foundation of China(Nos.51772329,51972340)。
文摘Porous carbon materials doped with atomically dispersed metal sites(ADMSs)are promising electrocatalysts for oxygen reduction reaction(ORR)electrocatalysis.In this work,we fabricated hierarchical porous nitrogen-doped carbon nanofibers with atomically dispersed Fe-N4 sites by carbonization of electrospinning iron-based metal-organic frameworks(MOFs)/polyacrylonitrile nanofibers for ORR electrocatalysis.Remarkably,the re sultant carbon nanofibers with atomically dispersed FeN4 sites exhibit extraordinary electrochemical performance with an onset potential of 0.994 V and a halfwave potential of 0.876 V in alkaline electrolyte,comparable to the benchmark commercial Pt/C catalyst.The high catalytic performance is originated from the unique hierarchically porous 1 D carbon structure and abundant highly active atomically dispersed Fe-N4 sites.
