Electrooxidation of amoxicillin on a Ti/Ta2O5/ Pt-RuO2-IrO2 electrode

Résumé

In this paper, the preparation of a dimensionnally stable electrode (DSA) thermally and using for the degradation of amoxicillin are presented.  The electrode prepared at 400 ° C is composed of Pt combined with ruthenium oxide and iridium oxide. The micropho of the surface of this electrode has characteristics similar to those of platinum and DSA's (RuO₂ and IrO₂). A non-zero current observed in this zone attests to the presence of the oxides (RuO₂ and IrO₂) in the surface of the new prepared electrode. Within a strongly protonated medium, the voltammetric charge of the PRI electrode is higher than in a weakly protonated medium. Moreover, the oxidation of amoxicillin on the PRI electrode can occur directly by electron exchange at the electrode/solution interface and/or through oxidative species produced in solution. In addition, chlorine ions affects the mechanism of the oxidation of amoxicillin on the PRI electrode. In the absence of chloride ions, the oxidation process of amoxicillin on the PRI electrode is essentially controlled by diffusion. But, in the presence of chloride, a mixed diffusion-adsorption process occurs during the oxidation of amoxicillin