The oxidation of ?-nicotinamide adenine dinucleotide (NADH) at poly(aniline)-coated electrodes Part II. Kinetics of reaction at poly(aniline)- poly(styrenesulfonate) composites
The oxidation of ?-nicotinamide adenine dinucleotide (NADH) at poly(aniline)-coated electrodes Part II. Kinetics of reaction at poly(aniline)- poly(styrenesulfonate) composites
Poly(aniline)–poly(styrenesulfonate) composite-coated glassy carbon electrodes are shown to produce a stable, reproducible amperometric response to NADH in citrate–phosphate buffer at pH 7. These responses have been studied as a function of electrode potential, film thickness and both NADH and NAD+ concentration. The results show that the oxidation of NADH occurs throughout the whole of the film and that NAD+, the reaction product, reversibly inhibits the reaction. Rate constants for the different processes have been obtained by kinetic modelling and compared with those previously determined for poly(aniline)–poly(vinylsulfonate) films. Preliminary comparisons imply that diffusion within ‘pores’ in these poly(aniline) composite matrices is important in determining the magnitude of the amperometric responses.
poly(aniline), nadh, rotating disc electrode, polymer modified electrode
electrocatalytic oxidation, redox polymers, enzyme switch, films
23-31
Bartlett, P. N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Wallace, E. N. K.
5f746388-2eb2-49eb-a041-c3babc102b10
22 May 2000
Bartlett, P. N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Wallace, E. N. K.
5f746388-2eb2-49eb-a041-c3babc102b10
Bartlett, P. N. and Wallace, E. N. K.
(2000)
The oxidation of ?-nicotinamide adenine dinucleotide (NADH) at poly(aniline)-coated electrodes Part II. Kinetics of reaction at poly(aniline)- poly(styrenesulfonate) composites.
Journal of Electroanalytical Chemistry, 486 (1), .
(doi:10.1016/S0022-0728(00)00123-6).
Abstract
Poly(aniline)–poly(styrenesulfonate) composite-coated glassy carbon electrodes are shown to produce a stable, reproducible amperometric response to NADH in citrate–phosphate buffer at pH 7. These responses have been studied as a function of electrode potential, film thickness and both NADH and NAD+ concentration. The results show that the oxidation of NADH occurs throughout the whole of the film and that NAD+, the reaction product, reversibly inhibits the reaction. Rate constants for the different processes have been obtained by kinetic modelling and compared with those previously determined for poly(aniline)–poly(vinylsulfonate) films. Preliminary comparisons imply that diffusion within ‘pores’ in these poly(aniline) composite matrices is important in determining the magnitude of the amperometric responses.
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Published date: 22 May 2000
Keywords:
poly(aniline), nadh, rotating disc electrode, polymer modified electrode
electrocatalytic oxidation, redox polymers, enzyme switch, films
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Local EPrints ID: 18940
URI: http://eprints.soton.ac.uk/id/eprint/18940
ISSN: 1572-6657
PURE UUID: 12584d63-9948-42f6-a834-a72fe722a906
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Date deposited: 21 Dec 2005
Last modified: 16 Mar 2024 02:42
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Author:
E. N. K. Wallace
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