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Velasco-Velez, Juan-Jesus ; Mom, Rik V. ; Sandoval-Diaz, Luis-Ernesto ; Falling, Lorenz J. ; Chuang, Cheng-Hao ; Gao, Dunfeng ; Jones, Travis E. ; Zhu, Qingjun ; Arrigo, Rosa ; Roldan Cuenya, Beatriz ; Knop-Gericke, Axel ; Lunkenbein, Thomas ; Schlögl, Robert:
Revealing the Active Phase of Copper during the Electroreduction of CO₂ in Aqueous Electrolyte by Correlating In Situ X-ray Spectroscopy and In Situ Electron Microscopy.
In: ACS Energy Letters.
Bd. 5
(2020)
Heft 6
.
- S. 2106-2111.
ISSN 2380-8195
DOI: https://doi.org/10.1021/acsenergylett.0c00802
Abstract
The variation in the morphology and electronic structure of copper during the electroreduction of CO2 into valuable hydrocarbons and alcohols was revealed by combining in situ surface- and bulk-sensitive X-ray spectroscopies with electrochemical scanning electron microscopy. These experiments proved that the electrified interface surface and near-surface are dominated by reduced copper. The selectivity to the formation of the key C-C bond is enhanced at higher cathodic potentials as a consequence of increased copper metallicity. In addition, the reduction of the copper oxide electrode and oxygen loss in the lattice reconstructs the electrode to yield a rougher surface with more uncoordinated sites, which controls the dissociation barrier of water and CO2. Thus, according to these results, copper oxide species can only be stabilized kinetically under CO2 reduction reaction conditions.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | WOS:000541766000045 |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Eingestellt am: | 13 Jun 2025 07:18 |
| Letzte Änderung: | 13 Jun 2025 07:18 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/93702 |