Record link: 
http://hdl.handle.net/20.500.12708/142351
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Title: 
Ligand and support effects on the reactivity and stability of Au₃₈(SR)₂₄ catalysts in oxidation reactions
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Citation: 
Zhang, B., Garcia Yago, C. I., Sels, A., Salassa, G., Rameshan, C., Llorca, J., Hradil, K., Rupprechter, G., Barrabés Rabanal, N., & Bürgi, T. (2019). Ligand and support effects on the reactivity and stability of Au₃₈(SR)₂₄ catalysts in oxidation reactions. Catalysis Communications, 130, Article 105768. https://doi.org/10.1016/j.catcom.2019.105768
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Publisher DOI: 
10.1016/j.catcom.2019.105768
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Publication Type: 
Article - Short/Brief/Rapid Communication
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Language: 
English
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Authors: 
Zhang, Bei 
Garcia Yago, Clara Isabel 
Sels, Annelies 
Salassa, Giovanni 
Rameshan, Christoph 
Llorca, Jordi 
Hradil, Klaudia 
Rupprechter, Günther 
Barrabés Rabanal, Noelia 
Bürgi, Thomas 
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Organisational Unit: 
E165-01 - Forschungsbereich Physikalische Chemie 
E057-04 - Fachbereich Röntgenzentrum 
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Journal: 
Catalysis Communications 
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ISSN: 
1566-7367
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Date (published): 
Oct-2019
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Number of Pages: 
7
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Publisher: 
ELSEVIER
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Peer reviewed: 
Yes
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Keywords: 
General Chemistry; Catalysis; Gold; Process Chemistry and Technology; Surface; Nanoclusters; Heterogeneous catalysis; Thiolate ligands; Oxidation reaction; Xafs
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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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Research Areas: 
Special and Engineering Materials: 25%
Materials Characterization: 25%
Surfaces and Interfaces: 50%
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Science Branch: 
Chemie
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