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Morphology and surface analysis of pure and doped cuboidal ceria nanoparticles

Bhatta, U.M., Reid, D., Sakthivel, T., Sayle, T.X.T., Sayle, D., Molinari, M., Parker, S.C., Ross, I.M., Seal, S., Möbus, G. and others. (2013) Morphology and surface analysis of pure and doped cuboidal ceria nanoparticles. Journal of Physical Chemistry C, 117 (46). pp. 24561-24569. ISSN 1932-7447. (doi:10.1021/jp405993v) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:46770)

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Abstract

Cuboidal nanoparticles of ceria are examined by high resolution imaging and analysis to explore their local morphology of faces, edges, and corners. Synthesized with and without Sm doping using a hydrothermal process, we find a high fraction of particles enclosed by {100} facets, which are normally energy-penalized compared to octahedral {111} facets. Electron tomography conducted at high magnification with lattice resolved imaging is combined with electron energy loss spectroscopy revealing oxidation states of Ce ions. It is found that extended {100} faces exist predominantly without local nanofaceting, except for {111} corner caps and subfacets on {110} edges. Reduced Ce is found on all {100} surfaces, while Sm doping does not lower the reduced Ce concentration. Molecular dynamics simulations are used to complement the microscopy, including the formation of {111} subfacets on {110} edges, formation of a {111} corner facet, and also the fact that reduced Ce ions prefer low coordinated positions like steps and corners along with more active {100} faces. © 2013 American Chemical Society.

Item Type: Article
DOI/Identification number: 10.1021/jp405993v
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - J. Phys. Chem. C [Field not mapped to EPrints] AD - Department of Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, United Kingdom [Field not mapped to EPrints] AD - Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield S1 3JD, United Kingdom [Field not mapped to EPrints] AD - School of Physical Sciences, University of Kent, Canterbury CT2 7NZ, United Kingdom [Field not mapped to EPrints] AD - Department of Chemistry, University of Bath, Claverton Down, Bath, Avon BA2 7AY, United Kingdom [Field not mapped to EPrints] AD - Advanced Materials Processing Analysis Center (AMPAC), Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, United States [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: Ce concentration, Ceria nanoparticles, Electron tomography, High magnifications, High-resolution imaging, Hydrothermal process, Molecular dynamics simulations, Oxidation state, Electric impedance tomography, Electron energy loss spectroscopy, Image reconstruction, Molecular dynamics, Morphology, Surface analysis, Nanoparticles
Subjects: Q Science
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Dean Sayle
Date Deposited: 06 Mar 2015 16:25 UTC
Last Modified: 29 May 2019 14:06 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46770 (The current URI for this page, for reference purposes)
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