Show simple item record

dc.contributor.authorBoualleg, Malika
dc.contributor.authorNorsic, Sébastien
dc.contributor.authorBaudouin, David
dc.contributor.authorSayah, Reine
dc.contributor.authorQuadrelli, Elsje Alessandra
dc.contributor.authorBasset, Jean-Marie
dc.contributor.authorCandy, Jean Pierre
dc.contributor.authorDélichère, Pierre
dc.contributor.authorPelzer, Katrin
dc.contributor.authorVeyre, Laurent
dc.contributor.authorThieuleux, Chloé
dc.date.accessioned2015-08-03T09:34:45Z
dc.date.available2015-08-03T09:34:45Z
dc.date.issued2011-12
dc.identifier.citationBoualleg, M., Norsic, S., Baudouin, D., Sayah, R., Quadrelli, E. A., Basset, J.-M., … Thieuleux, C. (2011). Selective and regular localization of accessible Pt nanoparticles inside the walls of an ordered silica: Application as a highly active and well-defined heterogeneous catalyst for propene and styrene hydrogenation reactions. Journal of Catalysis, 284(2), 184–193. doi:10.1016/j.jcat.2011.09.003
dc.identifier.issn00219517
dc.identifier.doi10.1016/j.jcat.2011.09.003
dc.identifier.urihttp://hdl.handle.net/10754/561947
dc.description.abstractWe describe here an original methodology related to the "build-the-bottle-around-the-ship" approach yielding a highly ordered silica matrix containing regularly distributed Pt nanoparticles (NPs) located inside the silica walls, Pt@{walls}SiO2. The starting colloidal solution of crystalline Pt nanoparticles was obtained from Pt(dba)2 (dba = dibenzylidene acetone) and 3-chloropropylsilane. The resulting nanoparticles (diameter: 2.0 ± 0.4 nm determined by HRTEM) resulted hydrophilic. The NPs present in the THF colloidal solution were incorporated inside the walls of a highly ordered 2D hexagonal mesoporous silica matrix via sol-gel process using a templating route with tetraethylorthosilicate, TEOS, as the silica source, and block copolymer (EthyleneOxide) 20(PropyleneOxide)70(EthyleneOxide)20 (Pluronic P123) as the structure-directing agent. Low-temperature calcination of the crude material at 593 K led to the final solid Pt@{walls}SiO2. Characterization by IR, HRTEM, BF-STEM and HAADF-STEM, SAXS, WAXS, XRD, XPS, H2 chemisorption, etc. of Pt@{walls}SiO2 confirmed the 2D hexagonal structuration and high mesoporosity (870 m2/g) of the material as well as the presence of stable 2-nm-sized crystalline Pt(0) NPs embedded inside the walls of the silica matrix. The material displayed no tendency to NPs sintering or leaching (Pt loading 0.3 wt.%) during its preparation. Pt@{walls}SiO2 was found to be a stable, selective and highly active hydrogenation catalyst. The catalytic performances in propene hydrogenation were tested under chemical regime conditions in a tubular flow reactor (278 K, propene/H2/He = 20/16/1.09 cm3/min, P tot = 1 bar) and were found superior to those of an homologous solid containing Pt NPs along its pore channels Pt@{pores}SiO2 and to those of a classical industrial catalysts Pt/Al2O3, (TOF = 2.3 s-1 vs. TOF = 0.90 and 0.92 s-1, respectively, calculated per surface platinum atoms). Pt@{walls}SiO2 also catalyzes fast and selective styrene hydrogenation. A material containing by design Pt NPs both in its walls and in its pores, Pt@{walls + pores}SiO2, is also described. © 2011 Elsevier Inc. All rights reserved.
dc.publisherElsevier BV
dc.subjectColloids
dc.subjectHeterogeneous catalysis
dc.subjectHydrogenation
dc.subjectMesoporous materials
dc.subjectNanoparticles
dc.subjectPlatinum
dc.titleSelective and regular localization of accessible Pt nanoparticles inside the walls of an ordered silica: Application as a highly active and well-defined heterogeneous catalyst for propene and styrene hydrogenation reactions
dc.typeArticle
dc.contributor.departmentChemical Science Program
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJournal of Catalysis
dc.contributor.institutionUniversité de Lyon, Institut de Chimie de Lyon, UMR 5265 - CNRS - Université Lyon 1, 43, Bd du 11 Novembre 1918, F-69616 Villeurbanne, France
dc.contributor.institutionUniversité de Lyon, Institut de Chimie de Lyon, UMR 5256 - CNRS - Université de Lyon 1, 2 avenue A. Einstein, F-69616 Villeurbanne, France
dc.contributor.institutionFritz-Haber-Institutes of the Max Planck Society, Department for Inorganic Chemistry, Faradayweg 4-6, 14195 Berlin, Germany
dc.contributor.institutionLaboratoire Chimie Provence UMR 6264, Université DAix-Marseille i, Campus St. Jérôme, 13397 Marseille Cedex 20, France
kaust.personBasset, Jean-Marie


This item appears in the following Collection(s)

Show simple item record