Electrocatalytic reduction of NAD⁺ at multi-walled carbon nanotubes modified electrode

The cyclic voltammetric (CV) behaviors of NAD⁺ were studied with a multi-walled carbon nanotubes (MWNTs) modified glassy carbon (GC) electrode. In 0.05 mol/L tris(hydroxymethyl)aminomethane-HCl (Tris-HCl) buffer solution (pH=6.9), the MWNTs modified electrode showed high electrocatalytic activity toward reduction of NAD⁺. The electroreduction of NAD ⁺ was an irreversible diffusion controlled process. The cathodic peak current increased linearly with increasing the concentration of NAD ⁺. The influences of scan rate, temperature and concentration were also investigated. $ 2005 SIOC, CAS, Shanghai, & WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.