All voltammetric experiments were performed using Autolab electro
analyzer, Model PG-STAT-101 from Metrohm (Switzerland). A conventional
three-electrode cell was used at room temperature with a carbon
paste modified electrode as the working electrode, Ag/AgCl (saturated
KCl) as the reference electrode and a platinumwire as the auxiliary electrode.
A RH B-KT/C magnetic stirrer was employed for deposition step
(Germany).