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Towards the surface hydroxyl species in CeO2 nanoparticles
Lomonosov Moscow State Univ, Dept Chem, Leninskije Gory 1, Moscow, Russia.
Lomonosov Moscow State Univ, Dept Chem, Leninskije Gory 1, Moscow, Russia.ORCID iD: 0000-0002-7805-8670
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
Lomonosov Moscow State Univ, Dept Chem, Leninskije Gory 1, Moscow, Russia.ORCID iD: 0000-0001-7591-4462
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2019 (English)In: Nanoscale, ISSN 2040-3364, E-ISSN 2040-3372, Vol. 11, no 39, p. 18142-18149Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY , 2019. Vol. 11, no 39, p. 18142-18149
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-406904DOI: 10.1039/c9nr06032dISI: 000512634500021PubMedID: 31555787OAI: oai:DiVA.org:uu-406904DiVA, id: diva2:1415997
Funder
EU, European Research Council, 759696Swedish Research Council, 2017-06465Available from: 2020-03-20 Created: 2020-03-20 Last updated: 2020-03-20Bibliographically approved

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Butorin, Sergei

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Romanchuk, Anna Yu.Butorin, SergeiKonyukhova, Anastasia D.Egorov, Alexander V.Shiryaev, Andrey A.Baranchikov, Alexander E.Dorovatovskii, Pavel V.Gerber, EvgenySozarukova, Madina M.Ivanov, Vladimir K.
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