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Zhu, Minghui ; Tian, Pengfei ; Kurtz, Ravi ; Lunkenbein, Thomas ; Xu, Jing ; Schlögl, Robert ; Wachs, Israel E. ; Han, Yi-Fan:
Strong Metal-Support Interactions between Copper and Iron Oxide during the High-Temperature Water-Gas Shift Reaction.
In: Angewandte Chemie International Edition.
Bd. 58
(2019)
Heft 27
.
- S. 9083-9087.
ISSN 1521-3773
DOI: https://doi.org/10.1002/anie.201903298
Abstract
The commercial high-temperature water-gas shift (HT-WGS) catalyst consists of CuO-Cr2O3-Fe2O3, where Cu functions as a chemical promoter to increase the catalytic activity, but its promotion mechanism is poorly understood. In this work, a series of iron-based model catalysts were investigated with in situ or pseudo in situ characterization, steady-state WGS reaction, and density function theory (DFT) calculations. For the first time, a strong metal-support interaction (SMSI) between Cu and FeOx was directly observed. During the WGS reaction, a thin FeOx overlayer migrates onto the metallic Cu particles, creating a hybrid surface structure with Cu-FeOx interfaces. The synergistic interaction between Cu and FeOx not only stabilizes the Cu clusters, but also provides new catalytic active sites that facilitate CO adsorption, H2O dissociation, and WGS reaction. These new fundamental insights can potentially guide the rational design of improved iron-based HT-WGS catalysts.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | WOS:000476691200019 |
| 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: | 12 Jun 2025 13:08 |
| Letzte Änderung: | 12 Jun 2025 13:08 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/93709 |