Highly efficient catalysts for oxygen reduction using well-dispersed iron carbide nanoparticles embedded in multichannel hollow nanofibers

Well-dispersed and highly active iron carbide nanoparticles encapsulated in multichannel hollow nanofibers (Fe₃C@MHNFs) were synthesizedviasimple electrospinning and calcination steps, exhibiting highly efficient activity and robust durability for oxygen reduction.