Electroreduction of O2 at a mediated Melanocarpus albomyces laccase cathode in a physiological buffer

Paul Kavanagh, Peter Jenkins, Dónal Leech*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

We report on oxygen reduction in a physiological buffer solution (0.05 M phosphate buffer containing dissolved O2, 0.1 M NaCl, pH 7.4, 37 °C) by Melanocarpus albomyces laccase, co-immobilized with [Os(2,2'-bipyridine)2(polyvinylimidazole)10Cl]+/2+ as a mediator, on glassy carbon electrodes. Such oxygen cathodes yielded current densities of 3.8 mA cm-2 at 0.2 V vs. Ag/AgCl, the largest current density reported to date for a mediated laccase cathode in physiological buffer solutions, showing promise for development of biocatalytic fuel cell prototypes.

Original languageEnglish
Pages (from-to)970-972
Number of pages3
JournalElectrochemistry Communications
Volume10
Issue number7
DOIs
Publication statusPublished - Jul 2008
Externally publishedYes

Keywords

  • Biocathode
  • Biofuel cell
  • Laccase
  • Osmium complexes
  • Oxygen reduction

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

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