Metal-organic framework-derived Fe3C@NC nanohybrids as highly-efficient oxygen reduction electrocatalysts in both acidic and basic media

The Fe3C@NCs hybrids were prepared by direct pyrolysis of the mixture of MIL-100(Fe) and dicyandiamide (DCDA) and subsequent acid-leaching treatment, which displayed superior ORR activity in both alkaline and acidic media.137