at Google ScholarTitle data
Mom, Rik V. ; Sandoval-Diaz, Luis-Ernesto ; Gao, Dunfeng ; Chuang, Cheng-Hao ; Carbonio, Emilia A. ; Jones, Travis E. ; Arrigo, Rosa ; Ivanov, Danail ; Hävecker, Michael ; Roldan Cuenya, Beatriz ; Schlögl, Robert ; Lunkenbein, Thomas ; Knop-Gericke, Axel ; Velasco-Vélez, Juan-Jesús:
Assessment of the Degradation Mechanisms of Cu Electrodes during the CO₂ Reduction Reaction.
In: ACS Applied Materials & Interfaces.
Vol. 15
(2023)
Issue 25
.
- pp. 30052-30059.
ISSN 1944-8252
DOI: https://doi.org/10.1021/acsami.2c23007
Abstract in another language
Catalyst degradation and product selectivity changes are two of the key challenges in the electrochemical reduction of CO2 on copper electrodes. Yet, these aspects are often overlooked. Here, we combine in situ X-ray spectroscopy, in situ electron microscopy, and ex situ characterization techniques to follow the long-term evolution of the catalyst morphology, electronic structure, surface composition, activity, and product selectivity of Cu nanosized crystals during the CO2 reduction reaction. We found no changes in the electronic structure of the electrode under cathodic potentiostatic control over time, nor was there any build-up of contaminants. In contrast, the electrode morphology is modified by prolonged CO2 electroreduction, which transforms the initially faceted Cu particles into a rough/rounded structure. In conjunction with these morphological changes, the current increases and the selectivity changes from value-added hydrocarbons to less valuable side reaction products, i.e., hydrogen and CO. Hence, our results suggest that the stabilization of a faceted Cu morphology is pivotal for ensuring optimal long-term performance in the selective reduction of CO2 into hydrocarbons and oxygenated products.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Additional notes: | WOS:001011620800001 |
| Keywords: | CO2RR; copper degradation; in situ EC-SEM; in situ X-ray spectroscopy; long-term reactions; electrocatalysis |
| Institutions of the University: | Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Operando-Analytics of Electrochemical Energy Storage > Chair Operando-Analytics of Electrochemical Energy Storage - Univ.-Prof. Dr. Thomas Lunkenbein |
| Result of work at the UBT: | No |
| DDC Subjects: | 500 Science > 540 Chemistry |
| Date Deposited: | 13 Jun 2025 07:34 |
| Last Modified: | 04 Jul 2025 11:31 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/93673 |