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Kottakkat, Tintula ; Klingan, Katharina ; Jiang, Shan ; Jovanov, Zarko P. ; Davies, Veronica H. ; El-Nagar, Gumaa A. ; Dau, Holger ; Roth, Christina:
Electrodeposited AgCu Foam Catalysts for Enhanced Reduction of CO₂ to CO.
In: ACS Applied Materials & Interfaces.
Bd. 11
(2019)
Heft 16
.
- S. 14734-14744.
ISSN 1944-8252
DOI: https://doi.org/10.1021/acsami.8b22071
Abstract
Selective electrochemical reduction of CO2 is an emerging field which needs more active and stable catalysts for its practicability. In this work, we have studied the influence of Ag metal incorporation into Cu dendritic structures on the product distribution and selectivity of CO2 electroreduction. Bimetallic AgCu foams prepared by hydrogen bubble templated electrodeposition shift the potentials of CO production to more positive values compared to bulk silver. The presence of Ag during the electrodeposition significantly changed the size and the shape of the dendrites in the pore walls of AgCu foams compared to Cu foam. The CO adsorption characteristics are studied by operando Raman spectroscopy. In the presence of Ag, the maximum CO adsorption is observed at a more positive potential. As a result, an improved selectivity for CO is obtained for AgCu foam catalysts at lower overpotentials compared to Cu foam catalyst, evidencing a synergistic effect between the bimetallic components. We were successful in increasing the CO mass activity with respect to the total Ag amount. AgCu foams are found to retain the CO selectivity during long-term operation, and with their easily scalable electrodeposition synthesis they possess high potential for industrial application.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Keywords: | CO2 electroreduction; electrocatalysis; electrodeposited AgCu foam; Raman spectroscopy; CO formation |
| Institutionen der Universität: | Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Werkstoffverfahrenstechnik > Lehrstuhl Werkstoffverfahrenstechnik - Univ.-Prof. Dr. Christina Roth Fakultäten Fakultäten > Fakultät für Ingenieurwissenschaften Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Werkstoffverfahrenstechnik |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 540 Chemie 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 28 Apr 2021 10:17 |
| Letzte Änderung: | 05 Apr 2022 09:50 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/64967 |