High-performance IN738 superalloy derived from turbine blade waste for efficient ethanol, ethylene glycol, and urea electrooxidation

Abstract In this work, IN738 superalloy used previously in gas turbines was recycled and as a working electrode for the electrooxidation of different fuels, namely ethylene glycol, ethanol, urea. The electrocatalytic efficiency studied by cyclic voltammetry, chronoamperometry, electrochemical impedance. Several kinetics parameters like diffusion coefficient, Tafel slope, rate constant, activation energy were calculated. modified characterized received using XRD, SEM, EDAX to elucidate crystal structure surface morphology before after oxidation. anodic current densities oxidation urea 29, 17, 12 mA.cm ?2 , respectively, an alkaline solution at potential 0.6 V (vs. Ag/AgCl). kinetic coefficients found be 1.5 $$\times$$ × 10 –6 1.038 0.64 cm 2 s ?1 respectively. charge transfer resistances estimated fuels impedance spectroscopy (EIS). Graphical