Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102183
Title: Cu–CeO2 nanocomposites: mechanochemical synthesis, physico-chemical properties, CO-PROX activity
Authors: Borchers, C.
Martin, M. L.
Vorobjeva, G. A.
Morozova, O. S.
Firsova, A. A.
Leonov, A. V.
Kurmaev, E. Z.
Kukharenko, A. I.
Zhidkov, I. S.
Cholakh, S. O.
Issue Date: 2016
Publisher: Springer Netherlands
Citation: Cu–CeO2 nanocomposites: mechanochemical synthesis, physico-chemical properties, CO-PROX activity / C. Borchers, M. L. Martin, G. A. Vorobjeva, et al. — DOI 10.1007/s11051-016-3640-6 // Journal of Nanoparticle Research. — 2016. — Vol. 18. — Iss. 11. — 344.
Abstract: Catalytic systems designated for preferential oxidation of CO in the presence of H2 are prepared by ball milling of Cu and CeO2, a simple and cheap one-step process to synthesize such catalysts. It is found that after 60 min of milling, a mixture of 8 wt.% Cu–CeO2 powders exhibits CO conversion of 96% and CO selectivity of about 65% at 438 K. Two active oxygen states, which are not observed in case of pure CeO2, were detected in the nanocomposite lattice and attributed to the presence of Cu in surface sites as well as in subsurface bulk sites. Correspondingly, oxidation of CO to CO2 was found to occur in a two-stage process with Tmax ≈ 395/460 K, and oxidation of H2 to H2O likewise in a two-stage process with Tmax ≈ 465/490 K. The milled powder consists of CeO2 crystallites sized 8–10 nm agglomerated to somewhat larger aggregates, with Cu dispersed on the surface of the CeO2 crystallites, and to a lesser extent present as Cu2O. [Figure not available: see fulltext.] © 2016, Springer Science+Business Media Dordrecht.
Keywords: COPPER-CERIA CATALYSTS
HIGH-RESOLUTION ELECTRON MICROSCOPY
MECHANOCHEMICAL SYNTHESIS
PREFERENTIAL OXIDATION OF CO
X-RAY PHOTOELECTRON SPECTROSCOPY
BALL MILLING
CARBON DIOXIDE
CATALYSTS
CATALYTIC OXIDATION
CRYSTALLITES
HIGH RESOLUTION ELECTRON MICROSCOPY
IONIZATION OF GASES
MILLING (MACHINING)
NANOCOMPOSITES
OXIDATION
CATALYTIC SYSTEM
COPPER CERIAS
MECHANOCHEMICAL SYNTHESIS
ONE-STEP PROCESS
OXIDATION OF CO
PHYSICOCHEMICAL PROPERTY
PREFERENTIAL OXIDATION
TWO-STAGE PROCESS
X RAY PHOTOELECTRON SPECTROSCOPY
CERIUM OXIDE
COPPER
NANOCOMPOSITE
NITRATE
UREA
ADSORPTION KINETICS
ARTICLE
CATALYST
COMBUSTION
CONCENTRATION (PARAMETERS)
CONTROLLED STUDY
MICROEMULSION
OXIDATION KINETICS
PHYSICAL CHEMISTRY
PRECIPITATION
PRIORITY JOURNAL
STRUCTURE ANALYSIS
SURFACE PROPERTY
SYNTHESIS
TEMPERATURE MEASUREMENT
TEMPERATURE PROGRAMMED REDUCTION MEASUREMENT
TRANSMISSION ELECTRON MICROSCOPY
X RAY DIFFRACTION
X RAY PHOTOELECTRON SPECTROSCOPY
URI: http://hdl.handle.net/10995/102183
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 84995893215
PURE ID: 1306056
6aa44053-f9f3-4e1e-9129-17375ffa9131
ISSN: 13880764
DOI: 10.1007/s11051-016-3640-6
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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