Development of highly active and robust Cu-Co–rGO electro-catalytic electrode for OER

Abstract In the present work a facile method was adopted for the fabrication of highly active and dimensionally stable cobalt-reduced graphene oxide (rGO) based composite electrode for OER process. The metal loading and the amount of graphene was optimized for better performance of the electrode. The development of these type of electrodes is noteworthy taking the advantage of the method and the materials used. The morphology and the composition were analyzed through scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX) and X-ray photo electron spectroscopy (XPS). Spectroscopic characterization was done using Fourier transform infrared (FTIR) analysis. Electrochemical characterization revealed excellent electro-catalytic activity of the prepared electrode and strongly suggest synergistic reaction between Co₃O₄ and rGO. The developed electrode can realize excellent Oxygen Evolution Reaction (OER) activity in alkaline media with low over potential and low tafel slope with long-term stability as evidenced from various analysis.