Electrocatalytic Oxidation of Methanol on a Glassy Carbon Modified Electrode by Bis(1,2-phenylenediamine) Nickel(II) Complex
A. Nozad Golikand a,* ٫ S.M. Golabib, M. Ghannadi Maragheha, L. Irannejada and M. Asgaria
aJaber Ibn Hayyan Research Lab., Atomic Energy Organization of Iran (AEOI), Tehran, Iran
bElectroanalytical Chemistry Lab., Faculty of Chemistry, University of Tabriz, Tabriz, Iran
Electrocatalytic oxidation of methanol on a glassy carbon electrode coated with Ni(II)-(1,2-phenylendiamine)2 (GC/NiOPD), conditioned by the potential recycling in a potential range of 100-650 mV (vs. SCE) is studied by cyclic voltammetry in an alkaline medium (0.10 M NaOH). The results show that the NiOPD layer formed at the surface of the electrode behaves as an efficient electrocatalyst for the oxidation of methanol in the alkaline medium via the Ni(ІІІ) species with a cross exchange reaction occurring throughout the layer at a low concentration of methanol. The effects of various parameters such as potential scan rates, methanol concentration and NiOPD surface concentration on the electro-oxidation of methanol are also investigated.
Keywords: Electrocatalytic oxidation, Methanol, Glassy carbon, Nickel, Ni(II)-(1,2-phenylendiamine)2, Modified electrode