Covalent organic frameworks based on electroactive naphthalenediimide as active electrocatalysts toward oxygen reduction reaction

•COFs can serve as efficient electrocatalysts for the oxygen reduction reaction.•Naphthalimide moieties serve as actives sites for the electrocatalysis.•ORR catalyzed by these COFs has preference for the 4-electron reduction pathway.•New insight into developing novel families of electrocatalysts from COFs.