Electrochemical reduction of 2-ethyl-9,10-anthraquinone (EAQ) and mediatedformation of hydrogen peroxide in a two-phase medium - Part I: Electrochemical behaviour of EAQ on a vitreous carbon rotating disc electrode (RDE) inthe two-phase medium

The electrochemical reduction of 2-ethyl-9,10-anthraquinone (EAQ) has been examined by voltammetry on a vitreous carbon rotating disk electrode (RDE) in a two-phase medium, The medium consisted of an organic phase consisting of a mixture of tributylphosphate (TBP) and diethylbenzene (DEB)(15/85, vol /vol) and an aqueous phase, 2M NaOH. The ratio between the two phases was 4 0% for the organic phase and 60% for the aqueous phase. The electrochemical behaviour of EAQ in this medium was examined on a vitreous carbon RDE in t he presence and absence of oxygen. The formation of hydrogen peroxide media ted by the electrochemical reduction of EAQ was studied analytically. The v oltammetric results indicate that hydrogen peroxide formation mediated by t he electrochemical reduction of EAQ is feasible.