at Google ScholarTitle data
Sandoval-Diaz, Luis ; Cruz, Daniel ; Vuijk, Maurits ; Ducci, Gianmarco ; Hävecker, Michael ; Jiang, Wulyu ; Plodinec, Milivoj ; Hammud, Adnan ; Ivanov, Danail ; Götsch, Thomas ; Reuter, Karsten ; Schlögl, Robert ; Scheurer, Christoph ; Knop-Gericke, Axel ; Lunkenbein, Thomas:
Metastable nickel-oxygen species modulate rate oscillations during dry reforming of methane.
In: Nature Catalysis.
Vol. 7
(2024)
.
- pp. 161-171.
ISSN 2520-1158
DOI: https://doi.org/10.1038/s41929-023-01090-4
Abstract in another language
When a heterogeneous catalyst is active, it forms metastable structures that constantly transform into each other. These structures contribute differently to the catalytic function. Here we show the role of different metastable oxygen species on a Ni catalyst during dry reforming of methane by combining environmental scanning electron microscopy, near ambient pressure X-ray photoelectron spectroscopy, on-line product detection and computer vision. We highlight the critical role of dissociative CO2 adsorption in regulating the oxygen content of the catalyst and in CH4 activation. We also discover rate oscillations during dry reforming of methane resulting from the sequential transformation of metastable oxygen species that exhibit different catalytic properties: atomic surface oxygen, subsurface oxygen and bulk NiOx. The imaging approach allowed the localization of fluctuating surface regions that correlated directly with catalytic activity. The study highlights the importance of metastability and operando analytics in catalysis science and provides impetus towards the design of catalytic systems.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Additional notes: | WOS:001138695100001 |
| Institutions of the University: | Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Operando-Analytics of Electrochemical Energy Storage > Chair Operando-Analytics of Electrochemical Energy Storage - Univ.-Prof. Dr. Thomas Lunkenbein |
| Result of work at the UBT: | No |
| DDC Subjects: | 500 Science > 540 Chemistry |
| Date Deposited: | 12 Jun 2025 08:14 |
| Last Modified: | 04 Jul 2025 11:31 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/93666 |