Web of Science: 17 cites, Scopus: 17 cites, Google Scholar: cites,
Ligand Migration from Cluster to Support : A Crucial Factor for Catalysis by Thiolate-protected Gold Clusters
Zhang, Bei (University of Geneva)
Sels, Annelies (University of Geneva)
Salassa, Giovanni (University of Geneva)
Pollitt, Stephan (Technische Universität Wien)
Truttmann, Vera (Technische Universität Wien)
Rameshan, Christoph (Technische Universität Wien)
Llorca, Jordi (Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques)
Olszewski, Wojciech (ALBA Laboratori de Llum de Sincrotró)
Rupprechter, Günther (Technische Universität Wien)
Bürgi, Thomas (University of Geneva)
Barrabés, Noelia (Technische Universität Wien)

Data: 2018
Resum: Thiolate protected metal clusters are valuable precursors for the design of tailored nanosized catalysts. Their performance can be tuned precisely at atomic level, e. g. by the configuration/type of ligands or by partial/complete removal of the ligand shell through controlled pre-treatment steps. However, the interaction between the ligand shell and the oxide support, as well as ligand removal by oxidative pre-treatment, are still poorly understood. Typically, it was assumed that the thiolate ligands are simply converted into SO, CO and HO. Herein, we report the first detailed observation of sulfur ligand migration from Au to the oxide support upon deposition and oxidative pre-treatment, employing mainly S K-edge XANES. Consequently, thiolate ligand migration not only produces clean Au cluster surfaces but also the surrounding oxide support is modified by sulfur-containing species, with pronounced effects on catalytic properties.
Nota: Número d'acord de subvenció MINECO/ENE2015-63969-R
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Llengua: Anglès
Document: article ; recerca ; publishedVersion
Matèria: Ligand effect ; Nanocluster ; Gold heterogeneous catalysis ; X-ray Absorption
Publicat a: ChemCatChem, Vol. 10, Issue 23 (December 2018) , p. 5372-5376, ISSN 1867-3899

DOI: 10.1002/cctc.201801474
PMID: 30713589

5 p, 2.3 MB

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 Registre creat el 2019-02-18, darrera modificació el 2020-08-08

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