Abstract
Developing nanostructured electrocatalysts, with low overpotential and high activity, has fundamental and technical importance in many fields. A new electrocatalyst for H2O2 oxidation based on strongly coupled rhodium nanocrystal/reduced graphene oxide (Rh/RGO) hybrid nanomaterials is described. The Rh/RGO nanohybrids markedly reduce the oxidation potential to about + 0.1 V, which is 0.5 V lower than that of a traditional platinum electrode. The nanohybrids have a strong synergetic effect and are catalytically more active than single-component Rh and RGO and state-of-the-art commercial Rh/C catalysts.