Application of carbon ceramic modified electrode with prussian blue for electrocatalytic oxidation of nitrite ion

A novel chemically modified electrode containing Prussian blue complex was achieved on the surface of glassy carbon electrode by sol-gel technique. The electrochemical behavior of modified electrode was characterized by cyclic voltammetry in detail. The film electrode obtained was very stable and exhibited electrocatalytic response for oxidation of nitrite. The experimental results showed at the bare GC electrode a small oxidation peak current which was observed at about 740 mV and a well-formed sharp catalytic oxidation peak at about 600 mV which was also observed at Prussian blue complex modified electrode. The transfer coefficient (α) for electrocatalytic oxidation of nitrite and the diffusion coefficient of this substance under the experimental conditions were also investigated.