Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh, 11671, Saudi Arabia
Ayman M. Mostafa
Department of Physics, College of Science, Qassim University, Buraidah, 51452, Saudi Arabia; Spectroscopy Department, Physics Research Institute, National Research Center, Giza, 12622, Egypt
Mariem M. Motawea
Department of Chemistry, College of Science, University of Bisha, Bisha, 61922, Saudi Arabia
Hoda A. Ahmed
Chemistry Department, Faculty of Science, Cairo University, 12613-Giza, Egypt; Chemistry Department, Faculty of Science at Yanbu, Taibah University, Yanbu, 46423, Saudi Arabia
Ali S. Alshomrany
Department of Physics, College of Sciences, Umm Al-Qura University, Al Taif HWY, Mecca, 24381, Saudi Arabia
Nickel-iron-based spinel oxide was prepared and supported on multi-walled carbon nanotubes to enhance the electrochemical oxidation of ethylene glycol in an alkaline medium. NiFe2O4 was prepared using facile sol-gel techniques. Then the prepared material was characterized using different bulk and surface techniques like powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), and transmitted electron microscope (TEM). Different electrodes of NiFe2O4/CNT ratios were prepared to find out the optimum spinel oxide/CNT ratio. The activity of the metal spinel oxides composite was characterized toward ethylene glycol conversion by different electrochemical techniques like cyclic voltammetry (CV), Chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS). The modified electrode reached an oxidation current of 43 mA cm−2 in a solution of 1.0 M ethylene glycol and 1.0 M NaOH. Furthermore, some kinetics parameters (like diffusion coefficient, and rate constant) were calculated to evaluate the catalytic performance. Additionally, the electrode showed extreme stability for long-term ethylene glycol oxidation.
