Cyclic voltammetric behavior of iron electrode in sodium hydroxide solutions

I. Zaafarany

Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, P.O. Box 118, Makkah Al Mukaramha (Saudia Arabia).

Received on March 10, 2009 and accepted on May 15, 2009

ABSTRACT

The electrochemical behaviour of iron electrode in different concentrations and sweep rate of NaOH solution were studied using cyclic voltammograms . Four anodic peaks (A1-A4) were observed in the anodic scan of cyclic voltammograms where as two cathodic peaks (C1 and C2) were observed in the cathodic scan of cyclic voltammograms. The four anodic peaks due to the formation Fe(OH)ads peak (A1), Fe(OH)2, peak (A2), Fe2O3(peak A3) and formation of more stable Fe(III) species (peak A4) and the cathodic scan due to the reduction of species formed on the anodic scan.

Keywords : Iron electrode, NaOH, Cyclic voltammograms, Electrochemistry.