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

Paul Kavanagh; Peter Jenkins; Dónal Leech

doi:10.1016/j.elecom.2008.04.025

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 journal › Article › peer-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 language	English
Pages (from-to)	970-972
Number of pages	3
Journal	Electrochemistry Communications
Volume	10
Issue number	7
DOIs	https://doi.org/10.1016/j.elecom.2008.04.025
Publication status	Published - Jul 2008
Externally published	Yes

Keywords

Biocathode
Biofuel cell
Laccase
Osmium complexes
Oxygen reduction

ASJC Scopus subject areas

General Chemical Engineering
Analytical Chemistry
Electrochemistry

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10.1016/j.elecom.2008.04.025

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title = "Electroreduction of O2 at a mediated Melanocarpus albomyces laccase cathode in a physiological buffer",

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.",

keywords = "Biocathode, Biofuel cell, Laccase, Osmium complexes, Oxygen reduction",

author = "Paul Kavanagh and Peter Jenkins and D{\'o}nal Leech",

year = "2008",

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doi = "10.1016/j.elecom.2008.04.025",

language = "English",

volume = "10",

pages = "970--972",

journal = "Electrochemistry Communications",

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TY - JOUR

T1 - Electroreduction of O2 at a mediated Melanocarpus albomyces laccase cathode in a physiological buffer

AU - Kavanagh, Paul

AU - Jenkins, Peter

AU - Leech, Dónal

PY - 2008/7

Y1 - 2008/7

N2 - 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.

AB - 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.

KW - Biocathode

KW - Biofuel cell

KW - Laccase

KW - Osmium complexes

KW - Oxygen reduction

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U2 - 10.1016/j.elecom.2008.04.025

DO - 10.1016/j.elecom.2008.04.025

M3 - Article

AN - SCOPUS:45649083270

SN - 1388-2481

VL - 10

SP - 970

EP - 972

JO - Electrochemistry Communications

JF - Electrochemistry Communications

IS - 7

ER -

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

Abstract

Keywords

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