Controlled surface segregation leads to efficient coke-resistant nickel/platinum bimetallic catalysts for the dry reforming of methane

Handle URI:
http://hdl.handle.net/10754/564043
Title:
Controlled surface segregation leads to efficient coke-resistant nickel/platinum bimetallic catalysts for the dry reforming of methane
Authors:
Li, Lidong; Zhou, Lu; Ould-Chikh, Samy; Anjum, Dalaver; Kanoun, Mohammed; Scaranto, Jessica; Hedhili, Mohamed Nejib; Khalid, Syed; Laveille, Paco; D'Souza, Lawrence; Clo, Alain M.; Basset, Jean-Marie ( 0000-0003-3166-8882 )
Abstract:
Surface composition and structure are of vital importance for heterogeneous catalysts, especially for bimetallic catalysts, which often vary as a function of reaction conditions (known as surface segregation). The preparation of bimetallic catalysts with controlled metal surface composition and structure is very challenging. In this study, we synthesize a series of Ni/Pt bimetallic catalysts with controlled metal surface composition and structure using a method derived from surface organometallic chemistry. The evolution of the surface composition and structure of the obtained bimetallic catalysts under simulated reaction conditions is investigated by various techniques, which include CO-probe IR spectroscopy, high-angle annular dark-field scanning transmission electron microscopy, energy-dispersive X-ray spectroscopy, extended X-ray absorption fine structure analysis, X-ray absorption near-edge structure analysis, XRD, and X-ray photoelectron spectroscopy. It is demonstrated that the structure of the bimetallic catalyst is evolved from Pt monolayer island-modified Ni nanoparticles to core-shell bimetallic nanoparticles composed of a Ni-rich core and a Ni/Pt alloy shell upon thermal treatment. These catalysts are active for the dry reforming of methane, and their catalytic activities, stabilities, and carbon formation vary with their surface composition and structure. The reform of reforming: A series of alumina-supported Ni/Pt bimetallic nanoparticles (NPs) with controlled surface composition and structure are prepared. Remarkable surface segregation for these bimetallic NPs is observed upon thermal treatment. These bimetallic NPs are active catalysts for CO2 reforming of CH4, and their catalytic activities, stabilities, and carbon formation vary with their surface composition and structure.
KAUST Department:
KAUST Catalysis Center (KCC); SABIC - Corporate Research and Innovation Center (CRI) at KAUST; Physical Sciences and Engineering (PSE) Division; Chemical Science Program; Core Labs; KAUST Supercomputing Laboratory (KSL)
Publisher:
Wiley-Blackwell
Journal:
ChemCatChem
Issue Date:
3-Feb-2015
DOI:
10.1002/cctc.201402965
Type:
Article
ISSN:
18673880
Sponsors:
We appreciate Saudi Basic Industries Corporation (SABIC) for financial support. We gratefully thank Dr. Elodie Guyonnet and Dr. Janet C. Mohandas for helpful discussions. KAUST Supercomputing Laboratory (KSL) is acknowledged for the allocated computing resources.
Appears in Collections:
Articles; KAUST Supercomputing Laboratory (KSL); Physical Sciences and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorLi, Lidongen
dc.contributor.authorZhou, Luen
dc.contributor.authorOuld-Chikh, Samyen
dc.contributor.authorAnjum, Dalaveren
dc.contributor.authorKanoun, Mohammeden
dc.contributor.authorScaranto, Jessicaen
dc.contributor.authorHedhili, Mohamed Nejiben
dc.contributor.authorKhalid, Syeden
dc.contributor.authorLaveille, Pacoen
dc.contributor.authorD'Souza, Lawrenceen
dc.contributor.authorClo, Alain M.en
dc.contributor.authorBasset, Jean-Marieen
dc.date.accessioned2015-08-03T12:29:34Zen
dc.date.available2015-08-03T12:29:34Zen
dc.date.issued2015-02-03en
dc.identifier.issn18673880en
dc.identifier.doi10.1002/cctc.201402965en
dc.identifier.urihttp://hdl.handle.net/10754/564043en
dc.description.abstractSurface composition and structure are of vital importance for heterogeneous catalysts, especially for bimetallic catalysts, which often vary as a function of reaction conditions (known as surface segregation). The preparation of bimetallic catalysts with controlled metal surface composition and structure is very challenging. In this study, we synthesize a series of Ni/Pt bimetallic catalysts with controlled metal surface composition and structure using a method derived from surface organometallic chemistry. The evolution of the surface composition and structure of the obtained bimetallic catalysts under simulated reaction conditions is investigated by various techniques, which include CO-probe IR spectroscopy, high-angle annular dark-field scanning transmission electron microscopy, energy-dispersive X-ray spectroscopy, extended X-ray absorption fine structure analysis, X-ray absorption near-edge structure analysis, XRD, and X-ray photoelectron spectroscopy. It is demonstrated that the structure of the bimetallic catalyst is evolved from Pt monolayer island-modified Ni nanoparticles to core-shell bimetallic nanoparticles composed of a Ni-rich core and a Ni/Pt alloy shell upon thermal treatment. These catalysts are active for the dry reforming of methane, and their catalytic activities, stabilities, and carbon formation vary with their surface composition and structure. The reform of reforming: A series of alumina-supported Ni/Pt bimetallic nanoparticles (NPs) with controlled surface composition and structure are prepared. Remarkable surface segregation for these bimetallic NPs is observed upon thermal treatment. These bimetallic NPs are active catalysts for CO2 reforming of CH4, and their catalytic activities, stabilities, and carbon formation vary with their surface composition and structure.en
dc.description.sponsorshipWe appreciate Saudi Basic Industries Corporation (SABIC) for financial support. We gratefully thank Dr. Elodie Guyonnet and Dr. Janet C. Mohandas for helpful discussions. KAUST Supercomputing Laboratory (KSL) is acknowledged for the allocated computing resources.en
dc.publisherWiley-Blackwellen
dc.subjectEXAFS spectroscopyen
dc.subjectnanoparticlesen
dc.subjectnickelen
dc.subjectplatinumen
dc.subjectsupported catalystsen
dc.titleControlled surface segregation leads to efficient coke-resistant nickel/platinum bimetallic catalysts for the dry reforming of methaneen
dc.typeArticleen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.contributor.departmentSABIC - Corporate Research and Innovation Center (CRI) at KAUSTen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentChemical Science Programen
dc.contributor.departmentCore Labsen
dc.contributor.departmentKAUST Supercomputing Laboratory (KSL)en
dc.identifier.journalChemCatChemen
dc.contributor.institutionBrookhaven National LaboratoryUpton, NY, United Statesen
kaust.authorLi, Lidongen
kaust.authorZhou, Luen
kaust.authorOuld-Chikh, Samyen
kaust.authorAnjum, Dalaveren
kaust.authorKanoun, Mohammeden
kaust.authorHedhili, Mohamed Nejiben
kaust.authorLaveille, Pacoen
kaust.authorClo, Alain M.en
kaust.authorBasset, Jean-Marieen
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