Electrochemical \(CO_{2}\) reduction
- The electrochemical conversion of \(CO_{2}\) into commodity chemicals or fuels is an attractive reaction for sustainable \(CO_{2}\) utilization. In this context, the application of gas diffusion electrodes is promising due to efficient \(CO_{2}\) mass transport. Herein, a scalable and reproducible method is presented for polytetrafluoroethylene (PTFE)-bound copper gas diffusion electrodes (GDEs) via the dry-pressing method and compositional parameters are emphasized to alter such electrodes. The assembly of the catalytic layer plays a critical role in the electrode performance, as elevated bulk hydrophobicity coupled with good surface wettability is observed to offer highest performance in 0.5 m KHCO\(_3\). With optimized electrodes, formate, CO, and H\(_2\) are obtained at a current density of 25 mA cm\(^{−2}\) as main products in 1 m KOH in faradaic efficiencies (FEs) of 27%, 30%, and 36%. At 200 mA cm\(^{−2}\), an altered product composition with ethylene (33% FE) and ethanol (9% FE) along with H\(_2\) (33% FE) is observed. In addition, \(\it n\)-propanol is observed with 7% faradaic efficiency. The results indicate that the composition of the GDE has a severe influence on the electrode performance and setting proper hydrophobicity gradients within the electrode is key toward developing a successful electrochemical \(CO_{2}\) reduction.
Author: | Kai Junge PuringORCiDGND, Daniel SiegmundORCiDGND, Jana TimmORCiDGND, Florian MöllenbruckGND, Steffen SchemmeORCiDGND, Roland MarschallORCiDGND, Ulf-Peter ApfelORCiDGND |
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URN: | urn:nbn:de:hbz:294-109400 |
DOI: | https://doi.org/10.1002/adsu.202000088 |
Parent Title (English): | Advanced sustainable systems |
Subtitle (English): | Tailoring catalyst layers in gas diffusion electrodes |
Publisher: | Wiley |
Place of publication: | Weinheim |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2024/02/23 |
Date of first Publication: | 2020/08/05 |
Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
Tag: | carbon dioxide; copper; electrocatalysis; ethylene; gas diffusion electrodes |
Volume: | 5 |
Issue: | 1, Artikel 2000088 |
First Page: | 2000088-1 |
Last Page: | 2000088-13 |
Note: | Dieser Beitrag ist auf Grund des DEAL-Wiley-Vertrages frei zugänglich. |
Institutes/Facilities: | Lehrstuhl für Anorganische Chemie I, Aktivierung kleiner Moleküle |
Dewey Decimal Classification: | Naturwissenschaften und Mathematik / Chemie, Kristallographie, Mineralogie |
open_access (DINI-Set): | open_access |
faculties: | Fakultät für Chemie und Biochemie |
Licence (English): | ![]() |