Laccase-gold nanoparticle assisted bioelectrocatalytic reduction of oxygen

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Laccase-gold nanoparticle assisted bioelectrocatalytic reduction of oxygen

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Publication Article, peer reviewed scientific
Title Laccase-gold nanoparticle assisted bioelectrocatalytic reduction of oxygen
Author(s) Dagys, Marius ; Haberska, Karolina ; Shleev, Sergey ; Arnebrant, Thomas ; Kulys, Juozas ; Ruzgas, Tautgirdas
Date 2010
English abstract
It was found that homogeneous activity of Trametes hirsuta laccase is considerably diminished in the presence of gold nanoparticles (Au-NPs). Heterogeneous electron transfer studies revealed that Au-NPs facilitate direct electron transfer (DET) between the T1 copper site of the laccase and the surface of Au-NP modified electrodes. DET was characterized by the standard heterogeneous ET constant of 0.5 +/- 0.6 s(-1) at Au-NPs with an average diameter of 50 nm. As a consequence of this a well pronounced DET based bioelectrocatalytic oxygen reduction with current densities of 5-30 mu A cm(-2) has been achieved at the laccase-Au-NP modified electrodes.
DOI http://dx.doi.org/10.1016/j.elecom.2010.04.024 (link to publisher's fulltext)
Publisher ScienceDirect
Host/Issue Electrochemistry CommunicationsCOMMUNICATIONS;7
Volume 12
ISSN 1388-2481
Pages 933-935
Language eng (iso)
Subject(s) DIRECT ELECTRON-TRANSFER
BIOFUEL CELLS
REDOX
ENZYMES
Sciences
Research Subject Categories::NATURAL SCIENCES::Chemistry::Analytical chemistry::Electrochemistry
Handle http://hdl.handle.net/2043/11373 (link to this page)

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