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Bioelectrocatalytic dioxygen reduction at carbon nanotubes – silicate composite film modified electrode

Martin Jönsson-Niedziółka 1Katarzyna Szot 1Jerzy Rogalski 2Katarzyna A. Karnicka 3Paweł J. Kulesza 3Marcin Opallo 1

1. Polish Academy of Sciences, Institute of Physical Chemistry, Kasprzaka 44/52, Warszawa 01-224, Poland
2. Maria Curie Sklodowska University, Department of Biochemistry, Pl. Sklodowskiej 3, Lublin 20-031, Poland
3. Warsaw University, Faculty of Chemistry, Pasteura 1, Warszawa 02-093, Poland


A tin-doped indium oxide electrode was shown to serve as a suitable support for a carbon nanotube – silicate composite matrix with encapsulated extracellular laccase from Cerrena unicolor. The mediator capable to shuttle electrons between electrode and protein was adsorbed 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonate) from aqueous solution. In deareated solution this electrode exhibits peak shaped voltammetric signal corresponding to the one-electron electrooxidation -reduction process of the surface confined mediator. In dioxygen saturated solution bioelectrocatalytic dioxygen reduction is observed with this electrode.


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Presentation: Poster at SMCBS'2007 International Workshop, by Martin Jönsson-Niedziółka
See On-line Journal of SMCBS'2007 International Workshop

Submitted: 2007-09-04 15:09
Revised:   2009-06-07 00:44