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Hämmerle, Martin ; Hilgert, Karin ; Moos, Ralf:
Optimisation of a biocathode for O2 reduction based on multi-walled carbon nanotubes and laccase.
2019
Veranstaltung: 2nd European Biosensor Symposium
, 18-21 February 2019
, Florence, Italy.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung
,
Poster
)
Abstract
In a recent article, Mano and de Poulpiquet reviewed O2 reduction in enzymatic fuel cells based on multicopper oxidases such as bilirubin oxidase or laccase. Miscellaneous electrode configurations based on these enzymes have already been presented in the literature encompassing direct or mediated electron transfer, various immobilisation matrices, and diverse electrode materials and structures. In this context, we present the optimisation of a biocathode for O2 reduction with respect to the composition of the immobilisation matrix. The enzyme was immobilised on a glassy carbon electrode by crosslinking. No mediator was employed, and a direct electron transfer between multi-walled carbon nanotubes (MWCNT) and laccase was established. The MWCNTs were dispersed with chitosan by ultrasound treatment. The immobilisation matrix contained a mixture of MWCNT, laccase from Trametes versicolor, and poly-(ethylene glycol) diglycidyl ether as crosslinker. The total amount of the immobilisation mixture (equivalent to the film thickness) as well as the portions of the individual components were varied. The performance of the biocathode was tested in nitrogen and pure oxygen atmosphere, respectively, while a potential of 0.4 V vs. Ag/AgCl was applied.
Weitere Angaben
| Publikationsform: | Veranstaltungsbeitrag (Poster) |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten > Fakultät für Ingenieurwissenschaften Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien > Lehrstuhl Funktionsmaterialien - Univ.-Prof. Dr.-Ing. Ralf Moos Profilfelder > Advanced Fields > Neue Materialien Forschungseinrichtungen > Zentrale wissenschaftliche Einrichtungen > Bayreuther Materialzentrum - BayMAT Fakultäten Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien Profilfelder Profilfelder > Advanced Fields Forschungseinrichtungen Forschungseinrichtungen > Zentrale wissenschaftliche Einrichtungen |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 18 Mär 2019 07:09 |
| Letzte Änderung: | 07 Sep 2023 08:42 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/47989 |