Design of a core–shell Pt–SiO2 catalyst in a reverse microemulsion system: Distinctive kinetics on CO oxidation at low temperature

Handle URI:
http://hdl.handle.net/10754/621717
Title:
Design of a core–shell Pt–SiO2 catalyst in a reverse microemulsion system: Distinctive kinetics on CO oxidation at low temperature
Authors:
Al Mana, Noor ( 0000-0002-3040-2620 ) ; Phivilay, Somphonh Peter ( 0000-0003-3625-8102 ) ; Laveille, Paco; Hedhili, Mohamed N. ( 0000-0002-3624-036X ) ; Fornasiero, Paolo; Takanabe, Kazuhiro ( 0000-0001-5374-9451 ) ; Basset, Jean-Marie ( 0000-0003-3166-8882 )
Abstract:
The mechanism of formation of Pt@SiO2 as a model of core–shell nanoparticles via water-in-oil reverse microemulsions was studied in detail. By controlling the time of growth of Pt precursors, Pt(OH)x, after hydrolysis in NH3 aq. before adding SiO2 precursor (TEOS), Pt nanoparticles with a narrow size distribution were produced, from ultrafine metal nanoparticles (<1 nm) to 6 nm nanocrystals. Separately, the thickness of SiO2 was controllably synthesized from 1 to 15 nm to yield different Pt@SiO2 materials. The Pt@SiO2 core–shell catalysts exhibited a higher rate of CO oxidation by one order of magnitude with a positive order regarding CO pressure. The SiO2 shell did not perturb the Pt chemical nature, but it provided different coverage of CO in steady-state CO oxidation. © 2016 Elsevier Inc.
KAUST Department:
KAUST Catalysis Center (KCC); Physical Sciences and Engineering (PSE) Division; Advanced Nanofabrication and Thin Film Core Lab; Imaging and Characterization Core Lab
Citation:
Almana N, Phivilay SP, Laveille P, Hedhili MN, Fornasiero P, et al. (2016) Design of a core–shell Pt–SiO2 catalyst in a reverse microemulsion system: Distinctive kinetics on CO oxidation at low temperature. Journal of Catalysis 340: 368–375. Available: http://dx.doi.org/10.1016/j.jcat.2016.06.002.
Publisher:
Elsevier BV
Journal:
Journal of Catalysis
Issue Date:
28-Jun-2016
DOI:
10.1016/j.jcat.2016.06.002
Type:
Article
ISSN:
0021-9517
Sponsors:
King Abdullah University of Science and Technology
Appears in Collections:
Articles; Advanced Nanofabrication, Imaging and Characterization Core Lab; Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorAl Mana, Nooren
dc.contributor.authorPhivilay, Somphonh Peteren
dc.contributor.authorLaveille, Pacoen
dc.contributor.authorHedhili, Mohamed N.en
dc.contributor.authorFornasiero, Paoloen
dc.contributor.authorTakanabe, Kazuhiroen
dc.contributor.authorBasset, Jean-Marieen
dc.date.accessioned2016-11-03T13:23:26Z-
dc.date.available2016-11-03T13:23:26Z-
dc.date.issued2016-06-28en
dc.identifier.citationAlmana N, Phivilay SP, Laveille P, Hedhili MN, Fornasiero P, et al. (2016) Design of a core–shell Pt–SiO2 catalyst in a reverse microemulsion system: Distinctive kinetics on CO oxidation at low temperature. Journal of Catalysis 340: 368–375. Available: http://dx.doi.org/10.1016/j.jcat.2016.06.002.en
dc.identifier.issn0021-9517en
dc.identifier.doi10.1016/j.jcat.2016.06.002en
dc.identifier.urihttp://hdl.handle.net/10754/621717-
dc.description.abstractThe mechanism of formation of Pt@SiO2 as a model of core–shell nanoparticles via water-in-oil reverse microemulsions was studied in detail. By controlling the time of growth of Pt precursors, Pt(OH)x, after hydrolysis in NH3 aq. before adding SiO2 precursor (TEOS), Pt nanoparticles with a narrow size distribution were produced, from ultrafine metal nanoparticles (<1 nm) to 6 nm nanocrystals. Separately, the thickness of SiO2 was controllably synthesized from 1 to 15 nm to yield different Pt@SiO2 materials. The Pt@SiO2 core–shell catalysts exhibited a higher rate of CO oxidation by one order of magnitude with a positive order regarding CO pressure. The SiO2 shell did not perturb the Pt chemical nature, but it provided different coverage of CO in steady-state CO oxidation. © 2016 Elsevier Inc.en
dc.description.sponsorshipKing Abdullah University of Science and Technologyen
dc.publisherElsevier BVen
dc.subjectCO oxidationen
dc.titleDesign of a core–shell Pt–SiO2 catalyst in a reverse microemulsion system: Distinctive kinetics on CO oxidation at low temperatureen
dc.typeArticleen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentAdvanced Nanofabrication and Thin Film Core Laben
dc.contributor.departmentImaging and Characterization Core Laben
dc.identifier.journalJournal of Catalysisen
dc.contributor.institutionDepartment of Chemical and Pharmaceutical Sciences, ICCOM-CNR, INSTM, Trieste Research Unit, University of Trieste, Via L. Giorgieri 1, Trieste, Italyen
kaust.authorAl Mana, Nooren
kaust.authorPhivilay, Somphonh Peteren
kaust.authorLaveille, Pacoen
kaust.authorHedhili, Mohamed N.en
kaust.authorTakanabe, Kazuhiroen
kaust.authorBasset, Jean-Marieen
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