Kinetics of peroxidase redox conversion on viologen-modified gold electrodes

The electrochemical conversions of horseradish peroxidase on methyl viologen- and benzyl viologen-modified gold electrodes have been studied. The formal heterogeneous rate constants, k o′ s,h, of the peroxidase redox reactions (ferri/ferro forms) equal 8.4(±0.25)×10 −4 and 1.3(±0.8)×10 −5 cm s −1, a...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry and interfacial electrochemistry 1986-01, Vol.198 (1), p.81-87
Main Authors: Razumas, Valdemaras J., Gudavičius, Arvydas V., Kulys, Juozas J.
Format: Article
Language:English
Subjects:
Applied sciences
Biological and medical sciences
Electrochemistry
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
Molecular biophysics
Other techniques and industries
Physical chemistry in biology
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Summary:The electrochemical conversions of horseradish peroxidase on methyl viologen- and benzyl viologen-modified gold electrodes have been studied. The formal heterogeneous rate constants, k o′ s,h, of the peroxidase redox reactions (ferri/ferro forms) equal 8.4(±0.25)×10 −4 and 1.3(±0.8)×10 −5 cm s −1, and the transfer coefficients, α, are 0.31(±0.06) and 0.71(±0.14) on benzyl viologen- and methyl viologen-modified electrodes, respectively. The participation of the peroxidase active centre in these processes was determined spectroelectrochemically.
ISSN:0022-0728
DOI:10.1016/0022-0728(86)90027-6