Electrocatalytic Activity of Macroheterocyclic Complexes in the Molecular Oxygen Electroreduction: A Cyclic Voltammetry Estimate

Author: Bazanov M. I.   Petrov A. V.   Zhutaeva G. V.   Turchaninova I. V.   Andrievski G.   Evseev A. A.  

Publisher: MAIK Nauka/Interperiodica

ISSN: 1023-1935

Source: Russian Journal of Electrochemistry, Vol.40, Iss.11, 2004-11, pp. : 1198-1204

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Abstract

Electrochemical and electrocatalytic properties of differently structured macroheterocyclic complexes (MC) are studied by a cyclic voltammetry method. The potential at half-height of the rising branch of the peak current of the first stage in the oxygen reduction, e^{o_2}_{1/2}, is used for estimating the electrocatalytic action of complexes. Major structural factors that exert maximum electrocatalytic action on the oxygen reduction are determined by comparing e^{o_2}_{1/2} for different MC. The maximum electrocatalytic activity in this reaction in 0.1 M KOH is exhibited by complexes containing cobalt and iron as the central metal atom as well as polymeric compounds and those having electron-donating substituents in the organic ligand.