Ultrathin graphitic C3N4 nanosheets/graphene composites: Efficient organic electrocatalyst for oxygen evolution reaction

Graphitic C3N4 (g-C3N4) is used as a low-cost organic oxygen evolution reaction (OER) electrocatalyst. The integration of ultrathin g-C3N4 nanosheets with graphene leads to g-C3N4/graphene composites with high OER activity and good durability. X-ray photoelectron spectroscopy (XPS) studies suggest that the OER activity results from pyridinic-N-related active sites. This catalyst provides an alternative to OER catalysts based on transition metals. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.