ELECTROCHEMICAL REDUCTION OF OXYGEN AT CO(II)-3,4-BIS(SALICYLIDENE DIIMINE)TOLUENE COMPLEX SUPPORTED GLASSY-CARBON ELECTRODE

Electrochemical reduction of oxygen has been carried out at glassy car bon electrode and carbon ultramicroelectrode, the surface of which is modified with a new Co(II)-Schiff base complex, Co(II)3,4-bis(salicyli dene diimine)toluene in 1 M KOH solution. The results obtained from cy clic voltammetric and chronoamperometric experiments are consistent wi th the formation of the reasonably stable superoxide ions as a primary electron transfer reaction product. The exchange rate constant obtain ed for oxygen reduction is about 0.02 cm/s.