Abstract
Electrochemical behavior of a di-Schiff base, N, N′-bis(2-hydroxy-1-naphthaldehyde)-m-phenylenediimine, NMPD, was investigated using cyclic voltammetry, chronoamperometry and controlled-potential coulometry in acetonitrile solution containing tetrabutylammonium perchlorate, as supporting electrolyte. The effect of different parameters such as potential scan rates, and time window of the chosen electrochemical method was examined in studying the electrochemical behavior of NMPD. According to the results of experiments, an EC2CE mechanism was proposed to electrochemical reduction of NMPD on the glassy carbon electrode surface. Furthermore, NMPD is an efficient electrocatalyst in reduction of CO2. This electrocatalytic activity is confirmed by 700 mV decreases in overpotential of CO2 reduction, significant increase in cathodic current of NMPD and also the spectrum characterization of the main product of the electrolysis process which is oxalic acid.
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