Ligand and support effects on the reactivity and stability of Au38(SR)24 catalysts in oxidation reactions
| Autor: | Thomas Bürgi, Klaudia Hradil, Günther Rupprechter, Clara Garcia, Christoph Rameshan, Annelies Sels, Giovanni Salassa, Bei Zhang, Noelia Barrabés, Jordi Llorca |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Universitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Matels -- Microstructure
Materials nanoestructurals Cyclohexane Thiolate ligands Catalitzadors Metal clusters 010402 general chemistry Heterogeneous catalysis Enginyeria dels materials [Àrees temàtiques de la UPC] Oxidació 01 natural sciences Redox Catalysis Nanoclusters Metal chemistry.chemical_compound Enginyeria química [Àrees temàtiques de la UPC] Metalls -- Microestructura Polymer chemistry Oxidation Reactivity (chemistry) Oxidation reaction Catalysts 010405 organic chemistry Ligand Xafs Process Chemistry and Technology General Chemistry Nanostructured materials 0104 chemical sciences Surface chemistry visual_art ddc:540 visual_art.visual_art_medium Compostos metàl·lics Gold |
| Zdroj: | Catalysis Communications, Vol. 130, No 105768 (2019) Recercat. Dipósit de la Recerca de Catalunya instname UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| ISSN: | 1566-7367 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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