Cyclic voltammtric behavior of copper electrode in sodium sulfide solutions

I. Zaafarany¹ and H. Boller²

¹Chemistry Department Faculty of Appllied Science, Umm Al-Qura University, Makkah Al Mukaramha, P.O.Box:118 (Saudi Arabia). ²Institute of Inorganic Chemistry, Johannes-Kepler-Universität Linz, A-4040 Linz (Austria).

Received on July 30, 2009 and accepted on October 01, 2009

ABSTRACT

The cyclic voltammograms of the copper electrode in Na2S solution was studied using cyclic volammogram’s technique.Three anodic peaks were observed in the anodic branch of the voltammogram’s. The peaks may be attributed successively to the formation of Cu2S, CuS and Cu2O. On the other hand, the cathodic branch shows four peaks. These peaks correspond to the reduction of copper oxide and copper sulfide formed in the anodic branch.

Keywords : Copper electrode, sodium sulfide, cyclic voltammetry.