Sulfur and Nitrogen Co‐Doped, Few‐Layered Graphene Oxide as a Highly Efficient Electrocatalyst for the Oxygen‐Reduction Reaction

Abstract S and N co‐doped, few‐layered graphene oxide is synthesized by using pyrimidine and thiophene as precursors for the application of the oxygen reduction reaction (ORR). The dual‐doped catalyst with pyrrolic/graphitic N‐dominant structures exhibits competitive catalytic activity (10.0 mA cm −2 kinetic‐limiting current density at −0.25 V) that is superior to that for mono N‐doped carbon nanomaterials. This is because of a synergetic effect of N and S co‐doping. Furthermore, the dual‐doped catalyst also shows an efficient four‐electron‐dominant ORR process, which has excellent methanol tolerance and improved durability in comparison to commercial Pt/C catalysts.