N-doped graphene as catalysts for oxygen reduction and oxygen evolution reactions: Theoretical considerations.

Highlights: [•] There was a linear relation between the binding energy of OOH* and OH* for the N-GNRs. [•] The most OER and ORR active sites were identified near the edge but not exactly on the edge of the armchair nanoribbons. [•] The minimum theoretic OER and ORR overpotential was calculated. [•] The calculations suggested that N-GNRs were a highly promising OER/ORR catalyst. [ABSTRACT FROM AUTHOR]