Ligand and support effects on the reactivity and stability of Au38(SR)24 catalysts in oxidation reactions

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dc.contributor	Universitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.contributor	Universitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia
dc.contributor.author	Zhang, Bei
dc.contributor.author	García Yago, Clara
dc.contributor.author	Sels, A.
dc.contributor.author	Salassa, Giovanni
dc.contributor.author	Rameshan, Christoph
dc.contributor.author	Llorca Piqué, Jordi
dc.contributor.author	Hradil, Klaudia
dc.contributor.author	Rupprechter, Guenther
dc.contributor.author	Barrabés, N.
dc.contributor.author	Bürgi, T.
dc.date	2019-10-01
dc.identifier.citation	Zhang, B. [et al.]. Ligand and support effects on the reactivity and stability of Au38(SR)24 catalysts in oxidation reactions. "Catalysis communications", 1 Octubre 2019, vol. 130, núm. 105768, p. 105768:1-105768:7.
dc.identifier.citation	1566-7367
dc.identifier.citation	10.1016/j.catcom.2019.105768
dc.identifier.uri	http://hdl.handle.net/2117/172711
dc.language.iso	eng
dc.relation	https://www.sciencedirect.com/science/article/pii/S1566736719302304
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Àrees temàtiques de la UPC::Enginyeria química
dc.subject	Àrees temàtiques de la UPC::Enginyeria dels materials
dc.subject	Nanostructured materials
dc.subject	Matels -- Microstructure
dc.subject	Metal clusters
dc.subject	Oxidation
dc.subject	Catalysts
dc.subject	Gold
dc.subject	Nanoclusters
dc.subject	Thiolate ligands
dc.subject	Heterogeneous catalysis
dc.subject	Oxidation reaction
dc.subject	Xafs
dc.subject	Surface
dc.subject	Materials nanoestructurals
dc.subject	Metalls -- Microestructura
dc.subject	Compostos metàl·lics
dc.subject	Oxidació
dc.subject	Catalitzadors
dc.title	Ligand and support effects on the reactivity and stability of Au38(SR)24 catalysts in oxidation reactions
dc.type	info:eu-repo/semantics/submittedVersion
dc.type	info:eu-repo/semantics/article
dc.description.abstract	Thiolate protected metal nanoclusters are emerging materials for the preparation of atomically defined heterogeneous catalysts. Recently it was revealed that the ligands migrated to the support upon cluster deposition, which influences the catalytic behaviour. Here we examined the role of the protecting thiolate ligands on the cyclohexane oxidation for Au38(SR)24 supported on CeO2 and Al2O3. Sulfur containing products were detected. XANES S K-edge measurements revealed SOx species on the support during the reaction. The results indicate (i) an active and complex role of the thiolate ligand and (ii) changes of cluster (surface) structure, depending on support material and reaction conditions.

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