NADH Oxidation Catalyzed by Electropolymerized Azines on Carbon Nanotube Modified Electrodes

作者：Li Hanzi; Wen Hao; Barton Scott Calabrese^*

来源：Electroanalysis, 2012, 24(2): 398-406.

DOI：10.1002/elan.201100573

• NADH oxidation
• Azines
• Carbon nanotube (CNT) modified electrode
• Electropolymerization
• Electrocatalyzation

Electropolymerizing azines on a carbon nanotube (CNT) modified electrode yields a high-surface area interface with excellent electrocatalytic activity towards NADH oxidation. Electrodeposition of poly(methylene green) (PMG) and poly(toluidine blue) (PTBO) on the carboxylated CNT-modified electrodes was achieved by cyclic voltammetry. The PMG-CNT interface demonstrates 5.0 mA?cm-2 current density for NADH oxidation at 50 mV?vs. Ag|AgCl in 20 mM NADH solution. The kinetics of NADH electrocatalysis were analyzed using a quantitative mass-transport-corrected model with NADH bulk concentration and applied potential as independent variables. This high-rate poly(azine)-CNT interface is potentially applicable to high-performance bioconversion, bioenergy and biosensors involving NADH-dependent dehydrogenases.

• 出版日期2012-2