The electrochemical behaviour of DSA and BDD electrodes during diclofenac electrooxidation

The electrooxidation of anti-inflammatory drug diclofenac (DCF) on Dimensionally Stable Anodes (DSA) and Boron Doped Diamond (BDD) electrode was investigated by cyclic voltammetry. The experiments were carried out in aqueous solutions by using 0.1 M NaSO4 supporting electrolyte. The DSA electrodes were prepared by thermal decomposition of appropriate precursors, while the BDD electrode was commercially produced. The DSA electrodic compositions were Ti/RuO2-TiO2 and Ti/RuO2/SnO2-Sb2O5. The recorded voltammograms showed that DCF direct oxidation did not occur on DSA and the oxidation could occur in the potential range of oxygen evolution. The electrooxidation of DCF on BDD electrode was possible by direct oxidation.