NOBLE-METAL-MODIFIED GLASSY-CARBON ELECTRODES FOR ETHYLENE-GLYCOL OXIDATION IN ALKALINE-MEDIUM

The electro-oxidation of ethylene glycol in an alkaline medium has bee n studied by cyclic voltammetry. Pt, Au and Pt + Au alloy supported on glassy carbon substrates were used as electrode materials. The deposi tion of Pt and Au particles produced an increase in current densities, especially at the peak potential, together with a shift of the oxidat ion peak to lower potential values. The results obtained for the Pt Au alloy on glassy carbon provided further evidence for the synergisti c effect of alloyed materials, with the maximum activity occurring at 40.0% Pt surface composition.