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Catalysis of the electrochemical reduction of oxygen by bacteria isolated from electro-active biofilms formed in seawater

Parot, Sandrine and Vandecandelaere, Ilse and Cournet, Amandine and Délia, Marie-Line and Vandamme, Peter and Bergé, Mathieu and Roques, Christine and Bergel, Alain Catalysis of the electrochemical reduction of oxygen by bacteria isolated from electro-active biofilms formed in seawater. (2011) Bioresource Technology, vol. 102 (n° 1). pp. 304-311. ISSN 0960-8524

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Official URL: http://dx.doi.org/10.1016/J.BIORTECH.2010.06.157

Abstract

Biofilmsformed in aerobic seawater on stainless steel are known to be efficient catalysts of the electrochemicalreduction of oxygen. Based on their genomic analysis, seven bacterial isolates were selected and a cyclic voltammetry (CV) procedure was implemented to check their electrocatalytic activity towards oxygenreduction. All isolates exhibited close catalytic characteristics. Comparison between CVs recorded with glassy carbon and pyrolytic graphite electrodes showed that the catalytic effect was not correlated with the surface area covered by the cells. The low catalytic effect obtained with filtered isolates indicated the involvement of released redox compounds, which was confirmed by CVs performed with adsorbed iron–porphyrin. None of the isolates were able to form electro-activebiofilms under constant polarization. The capacity to catalyze oxygenreduction is shown to be a widespread property among bacteria, but the property detected by CV does not necessarily confer the ability to achieve stable oxygenreduction under constant polarization.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at : http://www.sciencedirect.com/science/article/pii/S0960852410011624
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Ghent University (BELGIUM)
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Deposited By:Audrey LEFEVRE

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