at Google ScholarTitle data
Hämmerle, Martin ; Hilgert, Karin ; Moos, Ralf:
Gas diffusion biocathode for oxygen reduction based on direct electron transfer between carbon nanotubes and laccase.
2017
Event: 1st European & 10th German BioSensor Symposium
, 20.3.-23.3.2017
, Potsdam.
(Conference item: Conference
,
Poster
)
Abstract in another language
Enzymatic fuel cells found increased interest in recent years. In comparison to other fuel cells neither precious metal catalysts nor expensive membranes are needed, and they can be operated at room temperature. However, various issues such as limited stability or current density have to be addressed in order to improve their performance. For the oxygen reduction reaction at the biocathode based on multicopper oxidases such as bilirubin oxidase or laccase, gas diffusion electrodes have been proposed in order to avoid solubility and diffusion limitations of oxygen. In this context, we present the design of a gas diffusion biocathode based on laccase from Trametes versicolor. The enzyme is adsorbed on polymer (e.g. PEG 3000) modified multi-walled carbon nanotubes enabling a direct electron transfer from the enzyme to the electrode. The onset potential of the catalytic current starts at approx. 0.65 V vs. Ag/AgCl. The current density under potentiostatic control is approx. 50 μA/cm2 @ 0.4 V vs. Ag/AgCl in pure oxygen atmosphere. The response time is quite fast, reaching a steady state within a few seconds. Further results will be presented addressing the characteristics of the biocathode as well as modifications of its design.
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 > Central research institutes > Bayreuth Center for Material Science and Engineering - BayMAT Faculties Faculties > Faculty of Engineering Science > Chair Functional Materials Profile Fields Profile Fields > Advanced Fields Research Institutions Research Institutions > Central research institutes |
| Result of work at the UBT: | Yes |
| DDC Subjects: | 600 Technology, medicine, applied sciences > 620 Engineering |
| Date Deposited: | 03 Apr 2017 08:06 |
| Last Modified: | 07 Sep 2023 08:42 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/36734 |