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Advances in Physical Chemistry
Volume 2011 (2011), Article ID 947637, 21 pages
http://dx.doi.org/10.1155/2011/947637
Review Article

Recent Developments of Nanostructured Electrodes for Bioelectrocatalysis of Dioxygen Reduction

1Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
2Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland

Received 29 April 2011; Accepted 28 June 2011

Academic Editor: Milan M. Jaksic

Copyright © 2011 Marcin Opallo and Renata Bilewicz. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The recent development of nanostructured electrodes for bioelectrocatalytic dioxygen reduction catalysed by two copper oxidoreductases, laccase and bilirubin oxidase, is reviewed. Carbon-based nanomaterials as carbon nanotubes or carbon nanoparticles are frequently used for electrode modification, whereas there are only few examples of biocathodes modified with metal or metal oxide nanoparticles. These nanomaterials are adsorbed on the electrode surface or embedded in multicomponent film. The nano-objects deposited act as electron shuttles between the enzyme and the electrode substrate providing favourable conditions for mediatorless bioelectrocatalysis.