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Optimisation of a biocathode for O2 reduction based on multi-walled carbon nanotubes and laccase

Title data

Hämmerle, Martin ; Hilgert, Karin ; Moos, Ralf:
Optimisation of a biocathode for O2 reduction based on multi-walled carbon nanotubes and laccase.
2019
Event: 2nd European Biosensor Symposium , 18-21 February 2019 , Florence, Italy.
(Conference item: Conference , Poster )

Abstract in another language

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.

Further data

Item Type: Conference item (Poster)
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 18 Mar 2019 07:09
Last Modified: 18 Mar 2019 07:09
URI: https://eref.uni-bayreuth.de/id/eprint/47989