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Mediator‐Free Bioelectrocatalytic Oxidation of Ethanol on an Electrode from Thermally Expanded Graphite Modified by Gluconobacter oxydans Membrane Fractions
Author(s) -
Reshetilov A. N.,
Kitova A. E.,
Kolesov V. V.,
Yaropolov A. I.
Publication year - 2015
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201400610
Subject(s) - electrocatalyst , electrode , graphite , membrane , chemistry , desorption , ethanol , graphene , chitosan , chemical engineering , electrochemistry , materials science , biochemistry , adsorption , nanotechnology , organic chemistry , engineering
We studied bioelectrocatalytic oxidation of ethanol with membrane fractions of Gluconobacter oxydans VKM B‐1280 bacterial cells participating as an electrocatalyst. Material of the electrode was graphene‐like thermally expanded graphite of a high surface area and low resistivity. Membrane fractions were immobilized on the electrode surface by application in chitosan gel to prevent desorption of the biocatalyst. The bioelectrode characteristics were studied by the voltammetric and chronopotentiometric methods. It was shown that electrooxidation of ethanol on the bioanode could proceed both in the mode of direct mediator‐free electrocatalysis and by the mediator mechanism.