Investigation of Electrochemical Behavior of Alizarin yellow GG on glassy carbon electrode

In the present work, the electrochemical behavior of Alizarin Yellow GG was investigated on glassy carbon electrode. Cyclic voltammetry studies showed that the reduction mechanismof azo group (N=N) in Alizarin Yellow GG in acidic media is different from alkaline media. In an Acidic media, the azo group is reduced in a 2e-/2H+ process through hydrazo intermediate with an ECE mechanism. In an alkaline media as the acidic media, the azo group was reduced by a 2e-/2H+ process and the hydroazo intermediate is produced. However, the hydroazo intermediate was not protonated in alkaline medium; this means that it is stable and azo bond was not broken and in the reverse sweep, it was oxidized and again produces Alizarin Yellow GG (E mechanism).

Keywords:

Alizarin yellow GG , Electrochemical behavior determination , Cyclic voltammetry , Glassy carbon electrode