Production of P, N Co‐doped Graphene‐Based Materials by a Solution Process and Their Electrocatalytic Performance for Oxygen Reduction Reaction

Abstract

Abstract Graphene‐based materials are promising as metal‐free, cost‐effective electrocatalysts owing to their feasibility for mass production and excellent electrochemical properties. Recently, heteroatom co‐doping of graphene networks has been identified as a promising route to produce efficient electrocatalysts for the oxygen reduction reaction (ORR). In this study, we have synthesized a P, N co‐doped graphene‐based material (N−P−rG−O) using a two‐step solution process in which graphene oxide is sequentially reacted with phytic acid and ammonium hydroxide in water. The N−P−rG−O catalyst exhibits an onset potential for the ORR in basic medium (0.1 M KOH) of 0.89 V (vs. the reversible hydrogen electrode), following a four‐electron pathway and showing excellent stability against methanol poisoning in durability tests.