Controlled fabrication of Fe3N@NG composites as superior oxygen evolution reaction electrocatalysts

We report the controlled fabrication of nitrogen doped graphene (NG) nanoplates, which are uniformly deco-rated with iron nitride (Fe3N) nanoparticles, via ball milling of mixtures of graphite and iron nitrates and the following ammonia annealing. The obtained Fe3N@NG composites demonstrate excellent electrocatalytic ac-tivity and durability for oxygen evolution reaction, both of which outperform those of the state-of-the-art iridium oxide catalysts. This may be attributed to nitrogen doping as well as the synergistic effect between Fe3N and graphene nanoplates.