The electrocatalytic behaviour of 1,4-Diamino anthra-9,10-quinone at poly(3-methylthiophene-co-3,4-ethylenedioxythiophene) towards oxygen reduction were investigated in the pH range 1.0 – 13.0 using cyclic voltammetric, chronoamperometric and chrononcoulometric techniques. The stability and electrochemical behaviour of the copolymer modified electrode was studied and pH 7.0 was chosen as the optimum working pH by comparing the shift in oxygen reduction potential. The surface morphology of the modified electrode was also characterized by scanning electron microscope. The diffusion coefficient, surface coverage values and the number of electrons involved were determined.

Keywords: Voltammograms; Copolymer Modified Electrode; 1,4-Diamino Anthra-9,10-Quinone;