Electrocatalytic oxidation of NADH at an ordered carbon nanotubes modified glassy carbon electrode

Ordered carbon nanotubes (OCNTs), which was synthesized within the highly ordered pores of an alumina template membrane, were used to modify a glassy carbon (OCNT/GC) electrode. The OCNT/GC electrode showed potent electrocatalytic activity toward the electrochemical oxidation of NADH in phosphate buffer solution (pH 6.8) with a diminution of the overpotential of 645 mV. The anodic peak currents increase linearly with the concentration of NADH in the range of 2 x 10(-5) to 1 x 10(-3) M with a detection limit of 5 x 10(-7) M (at a S/N = 3). (C) 2004 Elsevier B.V. All rights reserved.