Effect of Some Parameters on Cyclic Voltammetry of Selenium in Ethaline

Cyclic voltammetry (CV) studies were used to investigate the interaction behavior of selenium from a solution containing selenium chloride (SeCl4) in choline chloride-ethylene glycol (EG) based ionic liquid called ethaline. The influences of various experimental conditions and some parameters on cyclic voltammetry have been investigated using a Hokudo Denko HAB-151 Potentiostat/Galvanostat, Tokyo, Japan, equipped with a potential sweeper. It is shown that the additions of 40 mL•L-1 acetonitrile and 0.05 mol•L-1 P2O5 cause significant changes in the shape and position of the voltammograms. The nature of cyclic voltammograms of Cu(II) has been changed dramatically in presence of the acetonitrile due to the strong interaction between metal ion and acetonitrile. The magnitude of the reduction current densities is significantly decreased on the addition of additives as compared with additive free IL. In this study, it was observed that an addition of acetonitrile as additive to solution containing Se(IV) with ethaline as supporting electrolyte caused an increase in the reduction current of Se(IV) by several factors and also with a slight cathodic shift in the reduction peak potential of Se(IV).