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    Ligand-free gold nanoclusters confined in mesoporous silica nanoparticles for styrene epoxidation

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    Type
    Presentation
    Authors
    Alshankiti, Buthainah cc
    Khashab, Niveen M. cc
    Almaksoud, Walid
    Abubaker, Habeeb
    Chaix, Arnaud
    Anjum, Dalaver H.
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Chemical Science Program
    Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division
    Electron Microscopy
    KAUST Catalysis Center (KCC)
    Physical Science and Engineering (PSE) Division
    Smart Hybrid Materials (SHMs) lab
    Date
    2019-03-31
    Permanent link to this record
    http://hdl.handle.net/10754/681611
    
    Metadata
    Show full item record
    Abstract
    We present a novel approach to produce gold nanoclusters (Au NCs) in the pores of mesoporous silica nanoparticles (MSN) by sequential and controlled addition of metal ions and reducing agents. The impregnation technique was followed to confine Au NCs inside the pores of MSN without adding external ligands or stabilizing agents. TEM images show uniform distribution of monodisperse NCs over the entire MSN. Since the NCs are grown in situ in MSN pores, additional support and high temperature calcination are not required to use them as catalysts. The use of MSN /Au NCs as a catalyst for the epoxidation of styrene resulted in very high conversion of styrene and high selectivity towards styrene epoxide. The catalysis reaction was environmentally friendly due to solvent free approach and low reaction temperature (60-80oC). Our synthetic approach can be extended to other metal NCs offering a wide range of applications.
    Publisher
    American Chemical Society (ACS)
    Journal
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
    Conference/Event name
    National Meeting of the American-Chemical-Society (ACS)
    Additional Links
    https://www.morressier.com/o/event/5fc642c603137aa525863c7c/article/5fc643a22d78d1fec4667eb8
    Collections
    Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC); Presentations; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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