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dc.contributor.authorAlshankiti, Buthainah
dc.contributor.authorAlmaksoud, Walid
dc.contributor.authorHabeeb Muhammed, Madathumpady Abubaker
dc.contributor.authorAnjum, Dalaver H.
dc.contributor.authorMoosa, Basem
dc.contributor.authorBasset, Jean-Marie
dc.contributor.authorKhashab, Niveen M.
dc.date.accessioned2020-04-29T07:55:01Z
dc.date.available2020-04-29T07:55:01Z
dc.date.issued2020
dc.date.submitted2019-12-15
dc.identifier.citationAl-Shankiti, B., Al-Maksoud, W., Habeeb Muhammed, M. A., Anjum, D. H., Moosa, B., Basset, J.-M., & Khashab, N. M. (2020). Ligand-free gold nanoclusters confined in mesoporous silica nanoparticles for styrene epoxidation. Nanoscale Advances, 2(4), 1437–1442. doi:10.1039/c9na00781d
dc.identifier.issn2516-0230
dc.identifier.doi10.1039/c9na00781d
dc.identifier.urihttp://hdl.handle.net/10754/662677
dc.description.abstractWe present a novel approach to produce gold nanoclusters (Au NCs) in the pores of mesoporous silica nanoparticles (MSNs) by sequential and controlled addition of metal ions and reducing agents. This impregnation technique was followed to confine Au NCs inside the pores of MSNs without adding external ligands or stabilizing agents. TEM images show a uniform distribution of monodisperse NCs with an average size of 1.37 ± 0.4 nm. 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 Au NC/MSNs as a catalyst for the epoxidation of styrene in the presence of tert-butyl hydroperoxide (TBHP) as a terminal oxidant resulted in an 88% conversion of styrene in 12 h with a 74% selectivity towards styrene epoxide. Our observations suggest that this remarkable catalytic performance is due to the small size of Au NCs and the strong interaction between gold and the MSNs. This catalytic conversion is environmentally friendly as it is solvent free. We believe our synthetic approach can be extended to other metal NCs offering a wide range of applications.
dc.description.sponsorshipThis work was supported by the King Abdullah University of Science & Technology (KAUST). We thank Dr Mohamed Nejib Hedhili for XPS analysis and Dr Edy AbouHmad for solid state NMR spectroscopy.
dc.publisherRoyal Society of Chemistry (RSC)
dc.relation.urlhttp://xlink.rsc.org/?DOI=C9NA00781D
dc.relation.urlhttps://pubs.rsc.org/en/content/articlepdf/2020/na/c9na00781d
dc.rightsThis is an open access article.
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/
dc.titleLigand-free gold nanoclusters confined in mesoporous silica nanoparticles for styrene epoxidation
dc.typeArticle
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.contributor.departmentChemical Science Program
dc.contributor.departmentElectron Microscopy
dc.contributor.departmentImaging and Characterization Core Lab
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentSmart Hybrid Materials (SHMs) lab
dc.contributor.departmentSmart Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Email: niveen.khashab@kaust.edu.sa
dc.identifier.journalNanoscale Advances
dc.eprint.versionPublisher's Version/PDF
dc.identifier.volume2
dc.identifier.issue4
dc.identifier.pages1437-1442
kaust.personAlshankiti, Buthainah
kaust.personAlmaksoud, Walid
kaust.personHabeeb Muhammed, Madathumpady Abubaker
kaust.personAnjum, Dalaver H.
kaust.personMoosa, Basem
kaust.personBasset, Jean-Marie
kaust.personKhashab, Niveen M.
dc.date.accepted2020-03-17
dc.identifier.eid2-s2.0-85083582438
refterms.dateFOA2020-04-29T07:55:28Z


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