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dc.contributor.authorLi, Lidong
dc.contributor.authorZhou, Lu
dc.contributor.authorOuld-Chikh, Samy
dc.contributor.authorAnjum, Dalaver H.
dc.contributor.authorKanoun, Mohammed
dc.contributor.authorScaranto, Jessica
dc.contributor.authorHedhili, Mohamed Nejib
dc.contributor.authorKhalid, Syed
dc.contributor.authorLaveille, Paco
dc.contributor.authorD'Souza, Lawrence
dc.contributor.authorClo, Alain M.
dc.contributor.authorBasset, Jean-Marie
dc.date.accessioned2015-08-03T12:29:34Z
dc.date.available2015-08-03T12:29:34Z
dc.date.issued2015-02-03
dc.identifier.issn18673880
dc.identifier.doi10.1002/cctc.201402965
dc.identifier.urihttp://hdl.handle.net/10754/564043
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.
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.
dc.publisherWiley-Blackwell
dc.subjectEXAFS spectroscopy
dc.subjectnanoparticles
dc.subjectnickel
dc.subjectplatinum
dc.subjectsupported catalysts
dc.titleControlled surface segregation leads to efficient coke-resistant nickel/platinum bimetallic catalysts for the dry reforming of methane
dc.typeArticle
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentSABIC - Corporate Research and Innovation Center (CRI) at KAUST
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.contributor.departmentChemical Science Program
dc.contributor.departmentCore Labs
dc.contributor.departmentKAUST Supercomputing Laboratory (KSL)
dc.identifier.journalChemCatChem
dc.contributor.institutionBrookhaven National LaboratoryUpton, NY, United States
kaust.personLi, Lidong
kaust.personZhou, Lu
kaust.personOuld-Chikh, Samy
kaust.personAnjum, Dalaver H.
kaust.personKanoun, Mohammed
kaust.personHedhili, Mohamed Nejib
kaust.personLaveille, Paco
kaust.personClo, Alain M.
kaust.personBasset, Jean-Marie


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