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Updated: Jun 10, 2026
Characterizing Electron Transport through Living Biofilms
Published on: June 1, 2018
Towards a high potential biocathode based on direct bioelectrochemistry between horseradish peroxidase and
Wenzhi Jia1, Stefanie Schwamborn, Chen Jin
1Analytische Chemie-Elektroanalytik & Sensorik, Ruhr-Universität Bochum, Universitätsstr. 150, D-44780 Bochum, Germany.
Abstract:
Adsorption of horseradish peroxidase (HRP) on graphite rod electrodes sequentially modified with carbon microfibers (CMF) carrying carbon nanotubes in a hierarchically structured arrangement and finally pyrene hexanoic acid (PHA) for improving hydrophilicity of the electrode surface is the basis for the direct bioelectrocatalytic reduction of H(2)O(2) at potentials as high as about +600 mV. The high-potential direct bioelectrocatalytic reduction of H(2)O(2) is implying a direct bioelectrochemical communication between the Fe(IV)=O,P(+*) redox state known as compound I. The HRP loading was optimized leading to a current of 800 microA at a potential of 300 mV.
