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Hawe, Philipp ; Lechner, Steffen ; Hartwig, Carl Eric ; Moos, Ralf ; Roth, Christina:
Dynamic Hydrogen Bubble Templated Cu Foams with tailored Ag Functionalization for CO₂RR electroreduction.
2026
Veranstaltung: GDCh Electrochemistry 2026
, September 22-25, 2026
, Bayreuth, Germany.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung
,
Poster
)
Abstract
Electrochemical reduction of CO₂ (CO₂RR) offers a promising way for converting greenhouse gases into value-added chemicals. Although copper-based catalysts have the potential to produce C2+ products, achieving high selectivity and activity remains a key challenge. In this study, we present a catalyst architecture based on a copper- silver bi-layered structure. It has been reported in literature that combining Ag and Cu locally separated has beneficial effects, as intermediates (CO) and products (C2H4) are produced sequentially. The proposed design is meant to promote tandem catalysis, in which Ag preferentially generates CO intermediates that can undergo spillover to adjacent Cu sites. Herein we use Ag foam structure generating a high local concentration of CO, which then feeds into the Cu foam structure for a higher CO2/CO fraction, increasing the overall FE for CO, and particularly a reduction of the parasitic hydrogen evolution reaction. In this work we investigate the incorporated Ag seeds, by either DHBT co-deposition or subsequent electroless plating onto pre-formed Cu foams. This enables controlled surface functionalisation using low precursor concentrations of silver nitrate c(AgNO3) = 1-5 mM and short deposition times (t ± 30 s). Incorporating this surface modification into the catalyst synthesis, small Ag-seeds distributed across the Cu scaffold leading to a hierarchical foam structure for good foam structure for good mass transport and improved micro-environment.
Weitere Angaben
| Publikationsform: | Veranstaltungsbeitrag (Poster) |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten > Fakultät für Ingenieurwissenschaften Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Werkstoffverfahrenstechnik > Lehrstuhl Werkstoffverfahrenstechnik - Univ.-Prof. Dr.-Ing. Christina Roth Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien > Lehrstuhl Funktionsmaterialien - Univ.-Prof. Dr.-Ing. Ralf Moos Profilfelder > Advanced Fields > Neue Materialien Forschungseinrichtungen > Zentrale wissenschaftliche Einrichtungen > Bayreuther Materialzentrum - BayMAT |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 15 Okt 2026 07:27 |
| Letzte Änderung: | 15 Okt 2026 07:27 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/99726 |