Issue 6, 2012

Electrocatalytic oxidation of NADH based on polyluminol and functionalized multi-walled carbon nanotubes

Abstract

This work presents that the electrocatalytic oxidation of NADH can be enhanced by the hybrid composites of polyluminol and functionalized multi-walled carbon nanotubes (MWCNTs). The hybrid composites can be easily prepared by the electropolymerization of luminol and the adsorption of functionalized MWCNTs. The modified electrode exhibits two redox couples which can show two electrocatalytic peaks at about 0.1 and 0.3 V (vs.Ag/AgCl) to NADH oxidation. The kinetic constant, kkin, for the electrocatalytic oxidation of NADH, evaluated by chronoamperometry and voltammetry using a rotating disk electrode (RDE), provided values close to 105 M−1 s−1. At an applied potential of 0.1 V, the sensor provides a linear response range for NADH from 5 × 10−6 up to 1.5 × 10−4 M with a sensitivity of 183.9 μA mM−1 cm−2, and detection and quantification limits of 0.6 and 5 μM (S/N = 3), respectively.

Graphical abstract: Electrocatalytic oxidation of NADH based on polyluminol and functionalized multi-walled carbon nanotubes

Article information

Article type
Paper
Submitted
07 Dec 2011
Accepted
11 Jan 2012
First published
10 Feb 2012

Analyst, 2012,137, 1378-1383

Electrocatalytic oxidation of NADH based on polyluminol and functionalized multi-walled carbon nanotubes

K. C. Lin, C. Y. Yin and S. M. Chen, Analyst, 2012, 137, 1378 DOI: 10.1039/C2AN16224E

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