Formation of mediated biocatalytic cathodes by electrodeposition of a redox polymer and laccase

Nicholas S. Hudak, Joshua W. Gallaway, Scott Calabrese Barton

    Research output: Research - peer-reviewArticle

    • 20 Citations

    Abstract

    Mediated biocatalytic cathodes were fabricated via electrodeposition of an osmium-based redox polymer onto planar and porous electrode surfaces, incorporating the oxygen-reducing enzyme laccase. After one hour of electrodeposition time, bio-cathodes on glassy carbon substrate exhibited redox site loading of 6 nmol cm-2 and oxygen reduction current density of 1.4 mA cm-2. Those on carbon-fiber paper exhibited redox site loading of 46 nmol cm-2 and oxygen reduction current density of 15.7 mA cm-2. The current density and polarization behavior were comparable to those of bio-cathodes made by conventional chemical crosslinking. The specific activity in terms of current per mole of redox polymer or enzyme was significantly higher for electrodeposited films.

    LanguageEnglish (US)
    Pages57-62
    Number of pages6
    JournalJournal of Electroanalytical Chemistry
    Volume629
    Issue number1-2
    DOIs
    StatePublished - Apr 15 2009

    Profile

    Laccase
    Electrodeposition
    Polymers
    Cathodes
    Oxidation-Reduction
    Current density
    Oxygen
    Enzymes
    Osmium
    Glassy carbon
    Crosslinking
    Polarization
    Electrodes
    Substrates
    carbon fiber
    Carbon fibers

    Keywords

    • Bioelectrocatalysis
    • Electrodeposition
    • Enzyme electrode
    • Laccase
    • Mediator
    • Redox polymer

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Analytical Chemistry
    • Electrochemistry

    Cite this

    Formation of mediated biocatalytic cathodes by electrodeposition of a redox polymer and laccase. / Hudak, Nicholas S.; Gallaway, Joshua W.; Barton, Scott Calabrese.

    In: Journal of Electroanalytical Chemistry, Vol. 629, No. 1-2, 15.04.2009, p. 57-62.

    Research output: Research - peer-reviewArticle

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