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