Innovative Route to Prepare of Au/C Catalysts by Replication of Gold-containing Mesoporous Silicas

Handle URI:
http://hdl.handle.net/10754/552437
Title:
Innovative Route to Prepare of Au/C Catalysts by Replication of Gold-containing Mesoporous Silicas
Authors:
Kerdi, Fatmé; Caps, Valerie; Tuel, Alain
Abstract:
Gold-catalyzed aerobic epoxidations in the liquid phase are generally performed in low-polarity solvents, in which conventional oxide-supported catalysts are poorly dispersed. To improve the wettability of the catalytic powder and, thus, the efficiency of the catalyst, gold nanoparticles (NPs) have been dispersed on meso-structured carbons. Gold is first introduced in functionalized mesostructured silica and particles are formed inside the porosity. Silica pores are then impregnated with a carbon precursor and the composite material is heated at 900 °C under vacuum or nitrogen. Silica is then removed by acid leaching, leading to partially encapsulated gold particles in mesoporous carbon. Carbon prevents aggregation of gold particles at high temperature, both the mean size and distribution being similar to those observed in silica. However, while Au@SiO2 exhibit significant catalytic activity in the aerobic oxidation of trans-stilbene in the liquid phase, its Au@C mesostructured replica is quite inactive.
KAUST Department:
KAUST Catalysis Center (KCC)
Citation:
Innovative Route to Prepare of Au/C Catalysts by Replication of Gold-containing Mesoporous Silicas 2011, 21:205 Physics Procedia
Publisher:
Elsevier BV
Journal:
Physics Procedia
Conference/Event name:
7th International Conference on Material Sciences, CSM7
Issue Date:
23-Dec-2011
DOI:
10.1016/j.phpro.2011.10.031
Type:
Conference Paper
ISSN:
18753892
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S187538921100650X
Appears in Collections:
Conference Papers; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorKerdi, Fatméen
dc.contributor.authorCaps, Valerieen
dc.contributor.authorTuel, Alainen
dc.date.accessioned2015-05-07T13:22:36Zen
dc.date.available2015-05-07T13:22:36Zen
dc.date.issued2011-12-23en
dc.identifier.citationInnovative Route to Prepare of Au/C Catalysts by Replication of Gold-containing Mesoporous Silicas 2011, 21:205 Physics Procediaen
dc.identifier.issn18753892en
dc.identifier.doi10.1016/j.phpro.2011.10.031en
dc.identifier.urihttp://hdl.handle.net/10754/552437en
dc.description.abstractGold-catalyzed aerobic epoxidations in the liquid phase are generally performed in low-polarity solvents, in which conventional oxide-supported catalysts are poorly dispersed. To improve the wettability of the catalytic powder and, thus, the efficiency of the catalyst, gold nanoparticles (NPs) have been dispersed on meso-structured carbons. Gold is first introduced in functionalized mesostructured silica and particles are formed inside the porosity. Silica pores are then impregnated with a carbon precursor and the composite material is heated at 900 °C under vacuum or nitrogen. Silica is then removed by acid leaching, leading to partially encapsulated gold particles in mesoporous carbon. Carbon prevents aggregation of gold particles at high temperature, both the mean size and distribution being similar to those observed in silica. However, while Au@SiO2 exhibit significant catalytic activity in the aerobic oxidation of trans-stilbene in the liquid phase, its Au@C mesostructured replica is quite inactive.en
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S187538921100650Xen
dc.rightsArchived with thanks to Physics Procedia. http://creativecommons.org/licenses/by-nc-nd/3.0/en
dc.subjectMesostructured carbonen
dc.subjectGold nanoparticlesen
dc.subjectCatalysisen
dc.subjectAerobic Oxidationen
dc.titleInnovative Route to Prepare of Au/C Catalysts by Replication of Gold-containing Mesoporous Silicasen
dc.typeConference Paperen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.identifier.journalPhysics Procediaen
dc.conference.date2010-05-20 to 2010-05-22en
dc.conference.name7th International Conference on Material Sciences, CSM7en
dc.conference.locationBeirut, LBNen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionIRCELYON, UMR 5256 CNRS-Université de Lyon, 2 avenue A. Einstein, 69626 Villeurbanne Cedex, Franceen
kaust.authorCaps, Valerieen
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