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dc.contributor.authorBruk, Lev
dc.contributor.authorTitov, Denis
dc.contributor.authorUstyugov, Alexander
dc.contributor.authorZubavichus, Yan
dc.contributor.authorChernikova, Valeriya
dc.contributor.authorTkachenko, Olga
dc.contributor.authorKustov, Leonid
dc.contributor.authorMurzin, Vadim
dc.contributor.authorOshanina, Irina
dc.contributor.authorTemkin, Oleg
dc.date.accessioned2018-04-16T11:27:45Z
dc.date.available2018-04-16T11:27:45Z
dc.date.issued2018-04-03
dc.identifier.citationBruk L, Titov D, Ustyugov A, Zubavichus Y, Chernikova V, et al. (2018) The Mechanism of Low-Temperature Oxidation of Carbon Monoxide by Oxygen over the PdCl2–CuCl2/γ-Al2O3 Nanocatalyst. Nanomaterials 8: 217. Available: http://dx.doi.org/10.3390/nano8040217.
dc.identifier.issn2079-4991
dc.identifier.pmid29614029
dc.identifier.doi10.3390/nano8040217
dc.identifier.urihttp://hdl.handle.net/10754/627546
dc.description.abstractThe state of palladium and copper on the surface of the PdCl2–CuCl2/γ-Al2O3 nanocatalyst for the low-temperature oxidation of CO by molecular oxygen was studied by various spectroscopic techniques. Using X-ray absorption spectroscopy (XAS), powder X-ray diffraction (XRD), and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), freshly prepared samples of the catalyst were studied. The same samples were also evaluated after interaction with CO, O2, and H2O vapor in various combinations. It was shown that copper exists in the form of Cu2Cl(OH)3 (paratacamite) nanophase on the surface of the catalyst. No palladium-containing crystalline phases were identified. Palladium coordination initially is comprised of four chlorine atoms. It was shown by XAS that this catalyst is not capable of oxidizing CO at room temperature in the absence of H2O and O2 over 12 h. Copper(II) and palladium(II) are reduced to Cu(I) and Pd(I,0) species, respectively, in the presence of CO and H2O vapor (without O2). It was found by DRIFTS that both linear (2114 cm−1, 1990 cm−1) and bridging (1928 cm−1) forms of coordinated CO were formed upon adsorption onto the catalyst surface. Moreover, the formation of CO2 was detected upon the interaction of the coordinated CO with oxygen. The kinetics of CO oxidation was studied at 18–38 °C at an atmospheric pressure for CO, O2, N2, and H2O (gas) mixtures in a flow reactor (steady state conditions).
dc.description.sponsorshipThis work was supported by the Russian Foundation for Basic Research (grant No. 16-33-00482) in the part related to the kinetic studies. Synchrotron radiation studies of catalysts were performed at the unique scientific facility of Kurchatov Synchrotron Radiation Source supported by the Ministry of Education and Science of the Russian Federation (project code RFMEFI61917X0007). L.M. Kustov and O.P. Tkachenko are thankful to Russian Scientific Foundation for financial support in the part related to the spectroscopic studies (Grant No. 14-50-00126).
dc.publisherMDPI AG
dc.relation.urlhttp://www.mdpi.com/2079-4991/8/4/217/htm
dc.rightsThis article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectcarbon monoxide
dc.subjectpalladium
dc.subjectcopper
dc.subjectnanocatalyst
dc.subjectoxidation
dc.titleThe Mechanism of Low-Temperature Oxidation of Carbon Monoxide by Oxygen over the PdCl2–CuCl2/γ-Al2O3 Nanocatalyst
dc.typeArticle
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.contributor.departmentChemical Science Program
dc.contributor.departmentFunctional Materials Design, Discovery and Development (FMD3)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalNanomaterials
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionMoscow Technological University, Institute of Fine Chemical Technology, Department of General Chemical Technology, Moscow 119571, Russia.
dc.contributor.institutionNational Research Centre
dc.contributor.institutionN.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia.
dc.contributor.institutionDeutsches Elektronen-Synchrotron DESY, D-22607 Hamburg, Germany.
kaust.personChernikova, Valeriya
refterms.dateFOA2018-06-14T04:21:37Z


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This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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