Pyridyne cycloaddition of graphene: “external” active sites for oxygen reduction reaction

Abstract

“External” nitrogen doped graphene sheets via pyridyne cycloaddition were fabricated, which can serve as feasible Pt alternatives for oxygen reduction reaction electrocatalysts. Notably, the excellent ORR performance of PyNGs can be attributed to the possible adsorption and catalytic site of the ortho-carbon of “external” nitrogen.