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dc.contributor.authorGolubina, E. V.
dc.contributor.authorLokteva, E. S.
dc.contributor.authorErokhin, A. V.
dc.contributor.authorMurzin, V. Yu
dc.contributor.authorChernikova, V. S.
dc.contributor.authorVeligzhanin, A. A.
dc.date.accessioned2021-04-26T07:59:32Z
dc.date.available2021-04-26T07:59:32Z
dc.date.issued2021-04-05
dc.date.submitted2020-08-01
dc.identifier.citationGolubina, E. V., Lokteva, E. S., Erokhin, A. V., Murzin, V. Y., Chernikova, V. S., & Veligzhanin, A. A. (2021). Formation of Active Centers of Nickel–Zinc Catalysts Deposited on the Nanodiamond for the Selective Hydrogenation of Phenylacetylene. Russian Journal of Physical Chemistry A, 95(3), 492–502. doi:10.1134/s0036024421030110
dc.identifier.issn1531-863X
dc.identifier.issn0036-0244
dc.identifier.doi10.1134/S0036024421030110
dc.identifier.urihttp://hdl.handle.net/10754/668944
dc.description.abstractAbstract: A study is performed of bimetallic catalysts NiZn/ND with ratios Ni : Zn = 1 : 1 and 1 : 3 prepared by impregnation using detonation nanodiamond (ND) as a support. They were compared with monometallic Ni/ND and Zn/ND. It is shown by nitrogen adsorption/desorption, scanning and transmission electron microscopy that metal deposition does not affect the porous structure or morphology of a support. Coordination of metal precursors on a nanodiamond surface proceeds with the participation of functional groups, as is confirmed by a change in the electrokinetic charge of the surface. The reduction of metal precursors is studied by temperature-programmed reduction and in situ XAFS spectroscopy. In Ni-containing samples, two forms of Ni2+ are found that are bonded differently with the support. ZnO is not reduced in the samples upon treatment with hydrogen at temperatures up to 400°C. The fraction of reduced nickel is determined by analyzing XANES spectra. Virtually full reduction of nickel is observed in a catalyst with a Ni : Zn ratio of 1 : 1 after 4 h of in situ treatment with hydrogen inside a spectrometer cell at 400°C, but not at a Ni : Zn ratio of 1 : 3 under the same conditions. The highest selectivity of styrene formation in the reaction of phenylacetylene hydrogenation throughout the investigated range of temperatures (100–350°С) is ensured by NiZn/ND; NiZn3/ND is less active and selective, since ZnO closes the active nickel centers and prevents the adsorption of phenylacetylene.
dc.description.sponsorshipThe authors acknowledge support from Lomonosov Moscow State University Program of Development for providing access to the SEM and HR TEM instruments. XAF spectra were ordained at the synchrotron radiation source of the National Research Center “Kurchatov Institute.”
dc.publisherPleiades Publishing Ltd
dc.relation.urlhttp://link.springer.com/10.1134/S0036024421030110
dc.rightsArchived with thanks to Russian Journal of Physical Chemistry A
dc.subjectsupported catalysts
dc.subjectnanodiamond
dc.subjectEXAFS
dc.subjecthydrogenation of phenylacetylene
dc.titleFormation of Active Centers of Nickel–Zinc Catalysts Deposited on the Nanodiamond for the Selective Hydrogenation of Phenylacetylene
dc.typeArticle
dc.contributor.departmentKing Abdullah University of Science and Technology, 23955, Thuwal, Saudi Arabia
dc.identifier.journalRussian Journal of Physical Chemistry A
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Chemistry, Moscow State University, 119991, Moscow, Russia
dc.contributor.institutionDESY, 22607, Hamburg, Germany
dc.contributor.institutionUniversity of Wuppertal, 42119, Wuppertal, Germany
dc.contributor.institutionNational Research Center Kurchatov Institute, 123098, Moscow, Russia
dc.identifier.volume95
dc.identifier.issue3
dc.identifier.pages492-502
kaust.personChernikova, V. S.
dc.date.accepted2020-08-03
dc.identifier.eid2-s2.0-85104020511


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