at Google ScholarTitle data
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.
Vol. 11
(2019)
Issue 16
.
- pp. 14734-14744.
ISSN 1944-8252
DOI: https://doi.org/10.1021/acsami.8b22071
Abstract in another language
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.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Keywords: | CO2 electroreduction; electrocatalysis; electrodeposited AgCu foam; Raman spectroscopy; CO formation |
| Institutions of the University: | Faculties > Faculty of Engineering Science > Chair Electrochemical Process Engineering > Chair Electrochemical Process Engineering - Univ.-Prof. Dr. Christina Roth Faculties Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Electrochemical Process Engineering |
| Result of work at the UBT: | No |
| DDC Subjects: | 500 Science > 540 Chemistry 600 Technology, medicine, applied sciences > 620 Engineering |
| Date Deposited: | 28 Apr 2021 10:17 |
| Last Modified: | 05 Apr 2022 09:50 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/64967 |