1D MOF‐Derived N‐Doped Porous Carbon Nanofibers Encapsulated with Fe3C Nanoparticles for Efficient Bifunctional Electrocatalysis

A facile yet efficient approach is introduced to rationally integrate Fe 3 C nanoparticles with Fe‐N‐doped mesoporous carbon nanofibers (denoted as Fe 3 C@FeN@CNF) by the direct‐electrospinning technique and a subsequent calcination process. Benefiting from the unique one‐dimensional structure with high porosity and the synergies among the active sites of Fe‐Nx, N‐C and graphitic carbon encapsulated Fe 3 C/Fe nanoparticles, the hierarchically structured Fe 3 C@FeN@CNF show enhanced electrocatalytic activity and durability for oxygen reduction and evolutionreactions, comparable to that of commercialized Pt/C and RuO 2 electrocatalysts. Significantly, the as‐fabricated Fe 3 C@FeN@CNF composite shows higher electrochemical performance than Pt/C in the Zn‐air battery.