Morphology and surface analysis of pure and doped cuboidal ceria nanoparticles

Umananda M. Bhatta, David Reid, Tamilselvan Sakthivel, Thi X. T. Sayle, Dean Sayle, Marco Molinari, Stephen C. Parker, Ian M. Ross, Sudipta Seal, Günter Möbus

Research output: Contribution to journalArticle

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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.
Original languageEnglish
Pages (from-to)24561-24569
Number of pages9
JournalJournal of Physical Chemistry C
Volume117
Issue number46
Early online date11 Oct 2013
DOIs
Publication statusPublished - 21 Nov 2013

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Cerium compounds
Surface analysis
Doping (additives)
Ions
Nanoparticles
Imaging techniques
flat surfaces
nanoparticles
Electron energy loss spectroscopy
Tomography
Molecular dynamics
Microscopic examination
Oxidation
Electrons
Computer simulation
magnification
caps
complement
ions
tomography

Cite this

Bhatta, U. M., Reid, D., Sakthivel, T., Sayle, T. X. T., Sayle, D., Molinari, M., ... Möbus, G. (2013). Morphology and surface analysis of pure and doped cuboidal ceria nanoparticles. Journal of Physical Chemistry C, 117(46), 24561-24569. https://doi.org/10.1021/jp405993v

Morphology and surface analysis of pure and doped cuboidal ceria nanoparticles. / Bhatta, Umananda M.; Reid, David; Sakthivel, Tamilselvan; Sayle, Thi X. T.; Sayle, Dean; Molinari, Marco; Parker, Stephen C.; Ross, Ian M.; Seal, Sudipta; Möbus, Günter.

In: Journal of Physical Chemistry C, Vol. 117, No. 46, 21.11.2013, p. 24561-24569.

Research output: Contribution to journalArticle

Bhatta, UM, Reid, D, Sakthivel, T, Sayle, TXT, Sayle, D, Molinari, M, Parker, SC, Ross, IM, Seal, S & Möbus, G 2013, 'Morphology and surface analysis of pure and doped cuboidal ceria nanoparticles', Journal of Physical Chemistry C, vol. 117, no. 46, pp. 24561-24569. https://doi.org/10.1021/jp405993v
Bhatta UM, Reid D, Sakthivel T, Sayle TXT, Sayle D, Molinari M et al. Morphology and surface analysis of pure and doped cuboidal ceria nanoparticles. Journal of Physical Chemistry C. 2013 Nov 21;117(46):24561-24569. https://doi.org/10.1021/jp405993v
Bhatta, Umananda M. ; Reid, David ; Sakthivel, Tamilselvan ; Sayle, Thi X. T. ; Sayle, Dean ; Molinari, Marco ; Parker, Stephen C. ; Ross, Ian M. ; Seal, Sudipta ; Möbus, Günter. / Morphology and surface analysis of pure and doped cuboidal ceria nanoparticles. In: Journal of Physical Chemistry C. 2013 ; Vol. 117, No. 46. pp. 24561-24569.
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