Electrocatalytic oxidation of sulfite Ion at the surface carbon ceramic modified electrode with prussian blue

The redox properties of sulfite ion have been examind using cyclic voltammetry in acetonitrile solvent at the surface of gold, pelatin and glassy carbon electrodes. It has been found that, sulfite ion exhibits two electron oxidation peak with EC’ mechanism. A novel and chemically modified electrode containing Prussian blue complex and multi wall carbon nanotubes (MWCNs) was achieved on the surface of glassy carbon electrode using sol-gel technique. The obtained film electrode was very stable and exhibited electrocatalytic response for oxidation of sulfite. Results showed that at bare GC electrode, a small oxidation peak current was observed at about 0.663mV and a well-formed sharp catalytic oxidation peak was observed at Prussian blue complex modified electrode. The transfer coefficient (α) for electrocatalytic oxidation of sulfite and the diffusion coefficient of this substance under the experimental conditions were also investigated.