Construction of an efficient electrode for a biofuel cell and hybrid devices powered by external fuel is the aim of our study. We focus on the development of an efficient cathode for the electroreduction of dioxygen using laccase and modified carbon nanotubes^1,2. In our study, single-walled carbon nanotubes (SWCNTs) were covalently modified with arylated group (anthraquinone, anthracene, aniline, terphenyl, naphthalene) and used for the construction of cathodes for biocatalytic reduction of dioxygen. The nanotubes with aromatic groups casted onto the electrode increased the working surface of the electrode and enabled efficient direct electron transfer (DET) between the enzyme and the electrode. The catalytic current density, potential and stability in time were compared for all of these electrodes, and the electrode showing the best properties was tested in a hybrid cell with Zn anode and in an enzymatic fuel cell with glucose dehydrogenase based anode.

References

1. K. Stolarczyk, E. Nazaruk, J. Rogalski, R. Bilewicz, Electrochim. Acta  53 (2008) 3983.

2. K. Sadowska, K. Stolarczyk, J.F. Biernat, K.P. Roberts, J. Rogalski, R. Bilewicz, Bioelectrochem. 80 (2010) 73.

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