Electrocatalytic Oxidation of Methanol at the Modified Glassy Carbon Electrode with Carbon Nanotubes, poly(4-methyl ortho phenylenediamine) Film and Nano-Particles of Copper Oxide in an Alkaline Solution

Document Type : Original Article


زنجان، دانشگاه زنجان، دانشکده علوم، گروه شیمی


The present study demonstrates the electrocatalytic oxidation of methanol in an alkaline medium on the modified glassy carbon electrodes. A thin film of Cu-poly(4-methyl, 1, 2-di-amino benzene) on multi-walled carbon nanotubes (MWNTs) modified glassy carbon electrode was used as anode for electrooxidation of methanol in the alkaline medium. The electrochemical behavior and electrocatalytic activity of the electrode were characterized by using cyclic voltammetry. The modified glassy carbon electrode consisting of a thin film of poly(4-methyl, 1, 2-di-amino benzene) which was formed by electropolymerization process. The effects of various parameters such as copper concentration, time of electrodeposition, number of CVs for pretreatment of the modified electrode in an alkaline solution on the electrooxidation of methanol have been investigated and the optimum values of each factors were suggested. The anodic oxidation of methanol with the modified electrode occurred at 0.75 V vs. Ag/AgCl and the treatment of the voltammetric data showed it was a purely diffusion controlled reaction. The modified electrode exhibits good catalytic activity for the oxidation of methanol in the wide concentration range 0.21-0.4 M.


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