ELECTROCATALYSIS OF COBALT DOPED CeO2/rGO NANOCOMPOSITE FOR OXIDATION OF METHANOL AND FORMIC ACID

In this study,a novel cobalt-doped cerium oxide (CeO2)on reduced graphene oxide (rGO) substrate was successfully prepared through a hydrothermal method.The comprehensive characterization of the synthesized nanocomposite involved X-ray diffraction studies (XRD),Raman spectrum analysis,High Resolution Transmission Electron microscopy (HRTEM), and Field Emission Electron Microscopy (FE-SEM).The effective surface area of CeO2/rGO and Co-CeO2/rGO was determined using the Randles-Sevecik equation,revealing values of 4.02X10-5 cm2 and 6.35X10-5 cm 2 ,respectively.Cyclic Voltammetry (CV) was employed to investigate the electrochemical reversibility behavior, demonstrating promising results for Co-CeO2/rGO nanocomposite.Electrochemical impedance spectroscopy(EIS) further highlighted low charge transfer resistance (Rct) and enhanced double-layer capacitance (Cdl).Notably, the synthesized nanocomposite exhibited excellent electrocatalytic activity for methanol and formic acid oxidation in an acidic medium. Overall, this work provides valuable insights into the synthesis characterization, and electrochemical performance of Co-CeO2/rGO nanocomposite, showcasing their potential applications in energy- related processes.