Biocathodes for Enzymatic Biofuel Cells Using Laccase and Different Redox Mediators Entrapped in Polypyrrole Matrix

This paper describes a comparative study of laccase-based biocathodes containing different redox mediator species, namely porphyrin, ferrocene, osmium, and ruthenium complexes were immobilized onto carbon platforms entrapped in an electropolymerized polypyrrole matrix. Ferrocenium hexafluorophosphat...

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Bibliographic Details
Published inJournal of the Electrochemical Society Vol. 161; no. 4; pp. F445 - F450
Main Authors Cardoso, F. P., Aquino Neto, S., Crepaldi, L. B., Nikolaou, S., Barros, V. P., De Andrade, A. R.
Format Journal Article
LanguageEnglish
Published The Electrochemical Society 01.01.2014
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Summary:This paper describes a comparative study of laccase-based biocathodes containing different redox mediator species, namely porphyrin, ferrocene, osmium, and ruthenium complexes were immobilized onto carbon platforms entrapped in an electropolymerized polypyrrole matrix. Ferrocenium hexafluorophosphate (Fc), an Iron (III) porphyrin (FeTMPyP), a ruthenium complex [Ru(byp)2Cl2], and an osmium complex [Os(byp)2Cl2] were employed as redox mediators and have been characterized by cyclic voltammetry. Methanol/O2 biofuel cell tests employing the biocathodes showed that they provide higher output power as compared with other systems. In the best conditions, the maximum power densities reached values around 81 ± 4 and 71 ± 3 μW cm−2 for [Ru(bpy)2Cl2] and [Os(bpy)2Cl2] at pH 4.5, respectively.
Bibliography:041404JES
ISSN:0013-4651
1945-7111
DOI:10.1149/2.041404jes