Boosting reversible oxygen electrocatalysis with enhanced interfacial pyridinic-N-Co bonding in cobalt oxide/mesoporous N-doped graphene hybrids

A hybrid electrocatalyst CoO/r-NLG with a high density of pyridinic-N-Co bonds was synthesized via pyrolysis treatments of a mixture of cobalt iron precursors and laser-induced mesoporous N-doped graphene, which achieved superb reversible ORR/OER activities, offering a low efficiency loss (Δ E ) of 0.635 V in a 1.0 M KOH electrolyte. A hybrid catalyst CoO/mesoporous N-doped graphene with enhanced pyridinic-N-Co bonding is designed and it exhibits superior bi-functional ORR/OER performance.