Vorträge und Posterpräsentationen (ohne Tagungsband-Eintrag):
N. Barrabés-Rabanal:
"Insights into nanocluster-surface interaction and reactivity";
Hauptvortrag: 18. Österreichische Chemietage,
Linz (eingeladen);
24.09.2019
- 27.09.2019.
Kurzfassung englisch:
Metal nanoclusters field is moving towards applications that involve the deposition of clusters on solid surfaces (oxides). We observed the flexibility and mobility of the cluster structure, once supported on surfaces and under reaction conditions by spectroscopic techniques [1]. The fate of the thiolates (ligands) during deposition of the clusters on an oxide support was never considered. This motivated us to study the evolution of the thiolate ligands upon supporting clusters on surfaces like CeO2. S K-edge XAFS measurements revealed for the first time ligand migration from the gold clusters to the support, manifested by formation of unexpected oxidized sulfur species [2]. Deeper analysis at Au L3-edge XAFS revealed the participation of the entire staple unit during the migration process.
Schlagworte:
Nanoclusters, heterogeneous catalysis, XAFS
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.