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Improvement of the selectivity of the electrochemical conversion of CO₂ to hydrocarbons using cupreous electrodes with in-situ oxidation by oxygen

Title data

Engelbrecht, Andreas ; Hämmerle, Martin ; Moos, Ralf ; Fleischer, Maximilian ; Schmid, Günter:
Improvement of the selectivity of the electrochemical conversion of CO₂ to hydrocarbons using cupreous electrodes with in-situ oxidation by oxygen.
In: Electrochimica Acta. Vol. 224 (2017) . - pp. 642-648.
ISSN 0013-4686
DOI: https://doi.org/10.1016/j.electacta.2016.12.059

Abstract in another language

It is still a challenge to find catalysts for the selective electrochemical reduction of CO2 to value added products. We present a new method for the in-situ modification of a copper catalyst by adding oxygen to the reactant gas. With an appropriate process procedure consisting of a sequence of electrolysis and purge steps, a Cu2O layer was formed during the purge steps. When it was reduced again during the next electrolysis step, Cu+ species remained stable on the surface and let to a higher faradaic efficiency for C2H4 formation and even a lower onset potential for CO2 reduction in general. This effect was observed for a wide range of O2 content from 10 % to 60 % in the reactant gas. In comparison to electrolysis with pure CO2, formation of methane was largely suppressed.

Further data

Item Type: Article in a journal
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
Research Institutions > Research Units > ZET - Zentrum für Energietechnik
Faculties
Faculties > Faculty of Engineering Science > Chair Functional Materials
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Units
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 16 Jan 2017 12:36
Last Modified: 16 Jan 2017 12:36
URI: https://eref.uni-bayreuth.de/id/eprint/35677