Membraneless glucose/oxygen enzymatic fuel cells using redox hydrogel films containing carbon nanotubes

Domhnall MacAodha, Peter Ó Conghaile, Brenda Egan, Paul Kavanagh, Dónal Leech*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Co-immobilisation of three separate multiple blue copper oxygenases, a Myceliophthora thermophila laccase, a Streptomyces coelicolor laccase and a Myrothecium verrucaria bilirubin oxidase, with an [Os(2,2′-bipyridine) 2(polyvinylimidazole)10Cl]+/2+ redox polymer in the presence of multi-walled carbon nanotubes (MWCNTs) on graphite electrodes results in enzyme electrodes that produce current densities above 0.5 mA cm -2 for oxygen reduction at an applied potential of 0 V versus Ag/AgCl. Fully enzymatic membraneless fuel cells are assembled with the oxygen-reducing enzyme electrodes connected to glucose-oxidising anodes based on co-immobilisation of glucose oxidase or a flavin adenine dinucleotide-dependent glucose dehydrogenase with an [Os(4,4′-dimethyl-2,2′-bipyridine) 2(polyvinylimidazole)10Cl]+/2+ redox polymer in the presence of MWCNTs on graphite electrodes. These fuel cells can produce power densities of up to 145 μW cm-2 on operation in pH 7.4 phosphate buffer solution at 37°C containing 150 mM NaCl, 5 mM glucose and 0.12 mM O2. The fuel cells based on Myceliophthora thermophila laccase enzyme electrodes produce the highest power density if combined with glucose oxidase-based anodes. Although the maximum power density of a fuel cell of glucose dehydrogenase and Myceliophthora thermophila laccase enzyme electrodes decreases from 110 μW cm-2 in buffer to 60 μW cm-2 on testing in artificial plasma, it provides the highest power output reported to date for a fully enzymatic glucose-oxidising, oxygen-reducing fuel cell in artificial plasma.

Original languageEnglish
Pages (from-to)2302-2307
Number of pages6
JournalChemPhysChem
Volume14
Issue number10
DOIs
Publication statusPublished - 22 Jul 2013
Externally publishedYes

Keywords

  • enzyme electrodes
  • fuel cells
  • glucose oxidation
  • oxygen reduction
  • redox chemistry

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics

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