Nickel-copper bimetallic particles dispersed into poly (ethylenedioxythiophene) as a novel electrocatalyst for electrochemical reduction of oxygen

[Display omitted] •PEDOT film was prepared electrochemically and modified with Ni-Cu NPs on GCE.•According to characterization studies, Cu and Ni NPs can deposite on PEDOT/GCE with nano diameter.•The best electrocatalytic activity for oxygen reduction was observed with Ni˗Cu/PEDOT/GCE.•Ni˗Cu/PEDOT/GCE has a catalytic surface for directly four-electron transfer in oxygen reduction. Electrochemical behaviour of oxygen was investigated at nickel–copper bimetallic particles covered into poly (ethylenedioxythiophene) modified glassy carbon electrode (Ni–Cu/PEDOT/GCE). The characterization tools which are energy-dispersive X–ray spectroscopy (EDX), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electrochemical impedance spectroscopy (EIS) were used to identify the morphology and chemical structure of the modified electrode surfaces. The best catalytic effect regarding to peak potential and peak current for O2 reduction were obtained with the Ni–Cu/PEDOT/GCE. The hydrodynamic studies have shown that the reduction of oxygen occurs via almost four electron transfer on the Ni–Cu/PEDOT/GCE.