Electrocatalytic Oxidation of Ascorbic Acid on Copper Iodide Modified Sol-Gel Derived Carbon Ceramic Electrode

In this research, we reported a novel modified carbon ceramic electrode using cuias modifier was fabricated by sol-gel technique. the electrocatalytic activity of the copperiodide modified sol-gel derived carbon ceramic (cim-sgd-cc) electrode was examined forthe oxidation of ascorbic acid (aa). results showed that the cim-sgd-cc electrode hashigh catalytic ability for electrooxidation of ascorbic acid. the response current exhibitedgood linear relationship for the concentration of ascorbic acid in the range from 5×10-4 to5×10-3 mol l-1, with the correlation coefficient of 0.9902 and the detection limit of 1.66 ?moll–1. the kinetic parameter such as the electron transfer coefficient (?) and exchange currentdensity (j0) for the modified electrode were calculated. the advantages of the modified cceare its good stability and reproducibility of surface renewal by simple polishing, excellentcatalytic activity and simplicity of preparation