Studies on electrocatalytic oxidation of catechols and ascorbic acid on the polymeric heme film modified electrode

The polymeric heme film modified glassy carbon electrode (polyheme/GC) was prepared by cyclic voltammetry, The electrochemical behavior of catechols ( catechol, dopamine, epinephrine) and ascorbic acid on the polyheme/GC elect rode has been investigated, The polyheme/GC electrode has a good electrocat alytic oxidation to catechols and ascorbic acid. On the polyheme/GC electro de, the oxidation peak currents of catechols and ascorbic acid increase and the oxidation peak potentials of catechols and ascorbic acid shift negativ ely about 180 mV and 370 mv,respectively, comparing with that on the GC ele ctrode, In the mixed solution containing catechols and ascorbic acid, the t wo oxidation peaks could be separated about 130 mV on the polyheme/GC elect rode.