Synergistic Effect of Trimetallic SnBiCu Nanoparticles Decorated on Graphene Oxide for Electrochemical Oxidation of Ethanol and Methanol

ABSTRACT Metal based nanocomposites have significant applications in energy storage devices, but graphene oxide‐based nanocomposites are well known for their ability to improve electrochemical characteristics. So, electrochemical characteristics of synthesized SnBiCu@GO nanocomposite were investigated and thoroughly examined utilizing a number of techniques. Cyclic voltammetry and electrochemical impedance spectroscopy were used to examine the electro‐oxidation behaviors of methanol and ethanol on SnBiCu@GO‐modified electrode in an alkaline media at different concentrations of KOH, NaOH, and KNO3. When compared with different electrolytes, the SnBiCu@GO nanocomposite with KNO3 electrolyte exhibited improved electrocatalytic efficiency and durability towards the oxidation of methanol and ethanol. The value of “ n ”, notably with n = 6 for methanol and n = 12 for ethanol, determined the electrocatalytic behavior of nanocomposite. The methanol oxidation reaction showed the highest and more consistent electrocatalytic activity, followed by ethanol oxidation reaction. Cyclic voltammogram data served as the basis for evaluation of diffusion coefficient and rate constant. Based on outcomes of both approaches, the diffusion coefficients were measured within range of 10^‐13 to 10^‐10 cm 2 /s and the rate constant ranged between 10^‐7 to 10^‐5 cm/s. Charge transfer resistance ( R ct ) was found within range of 13–78 Ω and solution resistance ( R s ) found within range of 0.002–168 Ω.