Determination of dissolved oxygen by catalytic reduction on Nafion-methyl viologen chemically modified electrode.
A small size Nafion-methyl viologen chemically modified electrode (Nafion-MV CME) together with a small size electrolytic cell were constructed for the purpose of dissolved oxygen (DO) determination. The catalytic reduction of DO on Nafion-MV CME results in fast and sensitive DO determination. The mechanism of such detection is also considered.
Electrocatalytic reduction of molecular oxygen on a sodium montmorillonite-methyl viologen carbon paste chemically modified electrode
A carbon paste electrode (CPE) modified with sodium montmorillonite (SWy-2)-methyl viologen (MV) is developed. The intermolecular complex of SWy-2 and MV has an electrocatalytic effect on oxygen reduction. The cyclic voltammograms of the electroreduction of molecular oxygen show an enhanced current peak in an air-saturated phosphate buffer solution. In this study, the experimental parameters are optimized and the mechanism of the catalytic process is discussed. This chemically modified electrode will offer a possibility of developing a sensitive method for the determination of dissolved oxygen.
Electroactive porphyrin films from electropolymerized metallotetra(o-aminophenyl)porphyrins
Electrochimie de films raisonnablement stables et probablement polymeriques sur des electrodes de Pt qui peuvent etre prepares par electro-oxydation de H 2 (o-TAPP) et plusieurs de ses derives metalles