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Jännsch, Yannick ; Leung, Jane J. ; Hämmerle, Martin ; Magori, Erhard ; Wiesner-Fleischer, Kerstin ; Simon, Elfriede ; Fleischer, Maximilian ; Moos, Ralf:
Pulsed potential electrochemical CO₂ reduction for enhanced stability and catalyst reactivation of copper electrodes.
In: Electrochemistry Communications.
Bd. 121
(2020)
.
- 106861.
ISSN 1388-2481
DOI: https://doi.org/10.1016/j.elecom.2020.106861
Angaben zu Projekten
| Projekttitel: |
Offizieller Projekttitel Projekt-ID Wertschöpfung durch elektrolytische Reduktion von CO2: Langzeitstabile, Ethen-selektive Prozessführung mit einem hochskalierbaren Verfahren AZ-1391-19 Open Access Publizieren Ohne Angabe |
|---|---|
| Projektfinanzierung: |
Bayerische Forschungsstiftung |
Abstract
The electrochemical conversion of CO2 is a promising route to fuels and feedstocks. One of the great challenges in employing copper-based electrodes towards the electrocatalytic reduction of CO2 is the unsustainable production of hydrocarbons over time. In this study, we show that by introducing a periodic pulsed operational mode during controlled potential electrolysis using low pulse frequencies in the range of Hz, the stability of ethylene production can be greatly increased from less than 8 h to at least 16 h. Furthermore, the method enables the reactivation of catalysts already deactivated for ethylene production. A duty cycle of >80%, deployment of a flow cell set-up, and a negligible loss of charge from the short anodic pulses as compared to the charge during the CO2 reducing cathodic pulses are important aspects of this pulsed electrolysis considering future application in real cell reactors.