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Sökning: WFRF:(Kvashnina K. O.) > (2015-2019) > Towards the surface...

Towards the surface hydroxyl species in CeO2 nanoparticles

Plakhova, Tatiana V. (författare)
Lomonosov Moscow State Univ, Dept Chem, Leninskije Gory 1, Moscow, Russia
Romanchuk, Anna Yu. (författare)
Lomonosov Moscow State Univ, Dept Chem, Leninskije Gory 1, Moscow, Russia
Butorin, Sergei (författare)
Uppsala universitet,Molekyl- och kondenserade materiens fysik
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Konyukhova, Anastasia D. (författare)
Lomonosov Moscow State Univ, Dept Chem, Leninskije Gory 1, Moscow, Russia
Egorov, Alexander V. (författare)
Lomonosov Moscow State Univ, Dept Chem, Leninskije Gory 1, Moscow, Russia
Shiryaev, Andrey A. (författare)
Lomonosov Moscow State Univ, Dept Chem, Leninskije Gory 1, Moscow, Russia;Russian Acad Sci, Frumkin Inst Phys Chem & Electrochem, Moscow, Russia
Baranchikov, Alexander E. (författare)
Lomonosov Moscow State Univ, Dept Chem, Leninskije Gory 1, Moscow, Russia;Russian Acad Sci, Kurnakov Inst Gen & Inorgan Chem, Moscow, Russia
Dorovatovskii, Pavel V. (författare)
Natl Res Ctr, Kurchatov Inst, Moscow, Russia
Huthwelker, Thomas (författare)
Paul Scherrer Inst, Swiss Light Source, WLGA 211, CH-5232 Villigen, Switzerland
Gerber, Evgeny (författare)
Rossendorf Beamline ESRF European Synchrotron, CS40220, F-38043 Grenoble 9, France;Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany
Bauters, Stephen (författare)
Rossendorf Beamline ESRF European Synchrotron, CS40220, F-38043 Grenoble 9, France;Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany
Sozarukova, Madina M. (författare)
Russian Acad Sci, Kurnakov Inst Gen & Inorgan Chem, Moscow, Russia
Scheinost, Andreas C. (författare)
Rossendorf Beamline ESRF European Synchrotron, CS40220, F-38043 Grenoble 9, France;Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany
Ivanov, Vladimir K. (författare)
Lomonosov Moscow State Univ, Dept Chem, Leninskije Gory 1, Moscow, Russia;Russian Acad Sci, Kurnakov Inst Gen & Inorgan Chem, Moscow, Russia
Kalmykov, Stepan N. (författare)
Lomonosov Moscow State Univ, Dept Chem, Leninskije Gory 1, Moscow, Russia;Russian Acad Sci, Frumkin Inst Phys Chem & Electrochem, Moscow, Russia
Kvashnina, Kristina O. (författare)
Rossendorf Beamline ESRF European Synchrotron, CS40220, F-38043 Grenoble 9, France;Helmholtz Zentrum Dresden Rossendorf HZDR, Inst Resource Ecol, POB 510119, D-01314 Dresden, Germany
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 (creator_code:org_t)
2019
2019
Engelska.
Ingår i: Nanoscale. - : ROYAL SOC CHEMISTRY. - 2040-3364 .- 2040-3372. ; 11:39, s. 18142-18149
Relaterad länk:
http://arxiv.org/pdf...
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https://urn.kb.se/re...
https://doi.org/10.1...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Understanding the complex chemistry of functional nanomaterials is of fundamental importance. Controlled synthesis and characterization at the atomic level is essential to gain deeper insight into the unique chemical reactivity exhibited by many nanomaterials. Cerium oxide nanoparticles have many industrial and commercial applications, resulting from very strong catalytic, pro- and anti-oxidant activity. However, the identity of the active species and the chemical mechanisms imparted by nanoceria remain elusive, impeding the further development of new applications. Here, we explore the behavior of cerium oxide nanoparticles of different sizes at different temperatures and trace the electronic structure changes by state-of-the-art soft and hard X-ray experiments combined with computational methods. We confirm the absence of the Ce(III) oxidation state at the surface of CeO2 nanoparticles, even for particles as small as 2 nm. Synchrotron X-ray absorption experiments at Ce L-3 and M-5 edges, combined with X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and small angle X-ray scattering (SAXS) and theoretical calculations demonstrate that in addition to the nanoceria charge stability, the formation of hydroxyl groups at the surface profoundly affects the chemical performance of these nanomaterials.

Ämnesord

NATURVETENSKAP  -- Kemi -- Materialkemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Materials Chemistry (hsv//eng)

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