Abstract

LEDEZMA, Isis  and  FERNANDEZ, Lenys. Anodic oxidation of NADH at surfactant-hydrotalcite-ferrocenedicarboxylic acid glassy carbon modified electrodes. Rev. Téc. Ing. Univ. Zulia [online]. 2007, vol.30, n.Especial, pp.234-244. ISSN 0254-0770.

We report on the electrochemical behavior of chemically modified glassy carbon (GC) electrodes by using surfactant/hydrotalcite (HT) films, incorporating ferrocenedicarboxylic acid (FDC) as redox mediators for NADH. The FDC retained in the films displayed two well-defined voltammetric peaks. They correspond to the redox process ferrocene/ferrocenium. The type of surfactants adsorbed have a pronounced effect on the FDC adsorption on the HT. The modified electrodes are found to give stable and reproducible electrocatalytic response to NADH and axhibit good stability.

Keywords : Synthetic hydrotalcite-like clay; nicotinamide adenine-dinucleotide oxidation; clay-modified electrode.