Cationic surface reconstructions on cerium oxide nanocrystals: An aberration-corrected HRTEM study

Bhatta, U.M. and Ross, I.M. and Sayle, T.X.T. and Sayle, D.C. and Parker, S.C. and Reid, D. and Seal, S. and Kumar, A. and Möbus, G. (2012) Cationic surface reconstructions on cerium oxide nanocrystals: An aberration-corrected HRTEM study. ACS Nano, 6 (1). pp. 421-430. ISSN 19360851 (ISSN). (doi:https://doi.org/10.1021/nn2037576) (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)

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Abstract

Instabilities of nanoscale ceria surface facets are examined on the atomic level. The electron beam and its induced atom migration are proposed as a readily available probe to emulate and quantify functional surface activity, which is crucial for, for example, catalytic performance. In situ phase contrast high-resolution transmission electron microscopy with spherical aberration correction is shown to be the ideal tool to analyze cationic reconstruction. Hydrothermally prepared ceria nanoparticles with particularly enhanced {100} surface exposure are explored. Experimental analysis of cationic reconstruction is supported by molecular dynamics simulations where the Madelung energy is shown to be directly related to the binding energy, which enables one to generate a visual representation of the distribution of "reactive" surface oxygen. © 2011 American Chemical Society.

Item Type: Article
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - ACS Nano [Field not mapped to EPrints] C2 - 22148265 [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 Electric Engineering, University of Sheffield, Sheffield, S1 3JD, United Kingdom [Field not mapped to EPrints] AD - Department Engineering and Applied Science, Cranfield University, Defense Academy of the U.K., Shrivenham, Swindon, SN6 8LA, United Kingdom [Field not mapped to EPrints] AD - Department Chemistry, University of Bath, Claverton Down, Bath, Avon, BA2 7AY, United Kingdom [Field not mapped to EPrints] AD - Advanced Materials Processing Analysis Center (AMPAC), Nanoscience Technology Center (NSTC), University of Central Florida, FL 32816, United States [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: atomic hopping, ceria, Madelung energy, nanoparticles, surface reconstruction, Atom migration, Atomic hopping, Atomic levels, Catalytic performance, Ceria nanoparticles, Cerium oxides, Experimental analysis, Functional surfaces, Hydrothermally, In-situ, Madelung energy, Molecular dynamics simulations, Nano scale, Phase contrasts, Spherical aberration correction, Surface exposure, Surface oxygen, Visual representations, Atoms, Binding energy, Cerium, Cerium compounds, Electron beams, High resolution transmission electron microscopy, Molecular dynamics, Molecular oxygen, Nanoparticles, Transmission electron microscopy, Surface reconstruction, cation, ceric oxide, cerium, nanomaterial, article, artifact, chemistry, image enhancement, materials testing, methodology, particle size, surface property, transmission electron microscopy, ultrastructure, Artifacts, Cations, Cerium, Image Enhancement, Materials Testing, Microscopy, Electron, Transmission, Nanostructures, Particle Size, Surface Properties
Subjects: Q Science
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Dean Sayle
Date Deposited: 27 Jan 2015 16:18 UTC
Last Modified: 27 Jan 2015 16:18 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46779 (The current URI for this page, for reference purposes)
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