Lanthanum modulated reaction pacemakers on a single catalytic nanoparticle.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
08 Nov 2023
08 Nov 2023
Historique:
received:
31
05
2023
accepted:
30
10
2023
medline:
8
11
2023
pubmed:
8
11
2023
entrez:
8
11
2023
Statut:
epublish
Résumé
Promoters are important in catalysis, but the atomistic details of their function and particularly their role in reaction instabilities such as kinetic phase transitions and oscillations are often unknown. Employing hydrogen oxidation as probe reaction, a Rh nanotip for mimicking a single Rh nanoparticle and field electron microscopy for in situ monitoring, we demonstrate a La-mediated local catalytic effect. The oscillatory mode of the reaction provides a tool for studying the interplay between different types of reaction pacemakers, i.e., specific local surface atomic configurations that initiate kinetic transitions. The presence of La shifts the bistable reaction states, changes the oscillation pattern and deactivates one of two pacemaker types for the La-free surface. The observed effects originate from the La-enhanced oxygen activation on the catalyst. The experimental observations are corroborated by micro-kinetic model simulations comprising a system of 25 coupled oscillators.
Identifiants
pubmed: 37938552
doi: 10.1038/s41467-023-43026-3
pii: 10.1038/s41467-023-43026-3
pmc: PMC10632447
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
7186Informations de copyright
© 2023. The Author(s).
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