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dc.contributor.authorAl-Shareef, Reem A.
dc.contributor.authorHarb, Moussab
dc.contributor.authorSaih, Youssef
dc.contributor.authorOuld-Chikh, Samy
dc.contributor.authorRoldan, Manuel A.
dc.contributor.authorAnjum, Dalaver H.
dc.contributor.authorGuyonnet, Elodie Bile
dc.contributor.authorCandy, Jean-Pierre
dc.contributor.authorJan, Deng-Yang
dc.contributor.authorAbdo, Suheil F.
dc.contributor.authorAguilar-Tapia, Antonio
dc.contributor.authorProux, Olivier
dc.contributor.authorHazemann, Jean-Louis
dc.contributor.authorBasset, Jean-Marie
dc.date.accessioned2018-05-14T13:37:07Z
dc.date.available2018-05-14T13:37:07Z
dc.date.issued2018-04-25
dc.identifier.citationAl-Shareef R, Harb M, Saih Y, Ould-Chikh S, Roldan MA, et al. (2018) Understanding of the structure activity relationship of PtPd bimetallic catalysts prepared by surface organometallic chemistry and ion exchange during the reaction of iso-butane with hydrogen. Journal of Catalysis 363: 34–51. Available: http://dx.doi.org/10.1016/j.jcat.2018.04.009.
dc.identifier.issn0021-9517
dc.identifier.doi10.1016/j.jcat.2018.04.009
dc.identifier.urihttp://hdl.handle.net/10754/627870
dc.description.abstractWell-defined silica supported bimetallic catalysts Pt100-x Pdx were prepared by Surface Organometallic Chemistry (SOMC) and Ionic-Exchange (IE) methods. For all investigated catalysts, iso-butane reaction with hydrogen under differential conditions led to the formation of methane and propane, n-butane, and traces of iso-butylene. The total reaction rate decreased with increasing the Pd loading for both catalysts series as a result of decreasing turnover rate of both isomerization and hydrogenolysis. In the case of Pt100-x Pdx(SOMC) catalysts, the experimental results in combination with DFT calculations suggested a selective coverage of Pt (1 0 0) surface by agglomerated Pd atoms like “islands”, assuming that each metal roughly keeps its intrinsic catalytic properties with relatively small electron transfer from Pt to Pd in the case of Pt-rich sample and from Pd to Pt in the case of Pd-rich sample. For the PtPd catalysts prepared by IE, the catalytic behavior could be explained by the formation of a surface alloy between Pt and Pd in the case of Pd-rich sample and by the segregation of a small amount of Pd on the surface in the case of Pt-rich sample, as demonstrated by TEM, EXAFS and DFT. The catalytic results were explained by a structure activity relationship based on the proposed mechanism of CH bond and CC bond activation and cleavage for iso-butane hydrogenolysis, isomerization, cracking and dehydrogenation.
dc.description.sponsorshipThis work was supported by King Abdullah University of Science and technology and in part by UOP LLC, a Honeycomb Company, Des plaines, Illinois 60017, United States (contract 1088).
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0021951718301441
dc.subjectBimetallic
dc.subjectPd-Pt
dc.subjectSurface organometallic chemistry (SOMC)
dc.subjectIso-butane hydrogenolysis
dc.subjectIsomerization
dc.subjectDehydrogenation
dc.subjectH2 Chemisorption
dc.titleUnderstanding of the structure activity relationship of PtPd bimetallic catalysts prepared by surface organometallic chemistry and ion exchange during the reaction of iso-butane with hydrogen
dc.typeArticle
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.contributor.departmentChemical Science Program
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentImaging and Characterization Core Lab
dc.identifier.journalJournal of Catalysis
dc.contributor.institutionExploratory Catalysis Research, UOP LLC, a Honeywell Company, 25 East Algonquin Road, Des Plaines, ILLinois 60017, United States
dc.contributor.institutionInstitut Néel, UPR 2940 CNRS, 38042 Grenoble Cedex 9, France
kaust.personAl-Shareef, Reem A.
kaust.personHarb, Moussab
kaust.personSaih, Youssef
kaust.personOuld-Chikh, Samy
kaust.personRoldan, Manuel A.
kaust.personAnjum, Dalaver H.
kaust.personGuyonnet, Elodie Bile
kaust.personCandy, Jean-Pierre
kaust.personBasset, Jean-Marie


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