Electrocatalytic reduction of dioxygen at the surface of glassy carbon electrodes modified by calix[6]arene-methyl viologen

The preparation and electrochemical characterization of glassy carbon elect rodes modified with calixarene-methyl viologen (MV) were investigated. The intermolecular complex of calix[6]arene and MV has an electrocatalytic effe ct on oxygen reduction. The cyclic voltammograms of the electroreduction of oxygen showed an enhanced current peak at approximately - 0.60 V in air-sa turated phosphate buffer. The experimental parameters were optimized and th e mechanism of the catalytic process was discussed. (C) 2000 Elsevier Scien ce B.V. All rights reserved.