NADH Oxidation Catalyzed by Electropolymerized Azines on Carbon Nanotube Modified Electrodes

被引:22
|
作者
Li, Hanzi [1 ]
Wen, Hao [1 ]
Barton, Scott Calabrese [1 ]
机构
[1] Michigan State Univ, Dept Chem Engn & Mat Sci, E Lansing, MI 48824 USA
基金
美国国家科学基金会;
关键词
NADH oxidation; Azines; Carbon nanotube (CNT) modified electrode; Electropolymerization; Electrocatalyzation; VERSATILE BIOELECTRONIC INTERFACES; TOLUIDINE BLUE O; ADENINE-DINUCLEOTIDE; METHYLENE GREEN; ELECTROCHEMICAL POLYMERIZATION; BIOFUEL CELLS; DEHYDROGENASE; MICROSCALE; BIOSENSORS; COFACTOR;
D O I
10.1002/elan.201100573
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
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.
引用
收藏
页码:398 / 406
页数:9
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