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

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

Research output: Contribution to journalArticle

  • 21 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
Current density
Oxygen
Enzymes
Osmium
Glassy carbon
Crosslinking
Carbon fibers
Polarization
Electrodes
Oxidation-Reduction
Substrates

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: Contribution to journalArticle

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