Effect of Lanthanum Manganite Modification by Calcium and/or Fluorine on the Bonding Strength, Mobility and Reactivity of the Lattice and Surface Oxygen Full article
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Symposium Z – Structure-Property Relationships of Oxide Surfaces and Interfaces II 02-03 Dec 2002 , Boston, Massachusetts |
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| Source | Structure-Property Relationships of Oxide Surfaces and Interfaces II: Volume 751 (MRS Proceedings) 1st Edition Compilation, Materials Research Society. 2003. 222 c. ISBN 9781558996885. |
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| Journal |
MRS Online Proceedings Library
ISSN: 1946-4274 |
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| Output data | Year: 2002, Volume: 751, Article number : 327, Pages count : 6 DOI: 10.1557/PROC-751-Z3.27 | ||||||||
| Tags | Chemical bonds; Chemical modification; Crystal lattices; Manganese compounds; Secondary ion mass spectrometry; Transmission electron microscopy; X ray diffraction analysis | ||||||||
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| Affiliations |
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Funding (1)
| 1 | International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union | IR-97-402 |
Abstract:
Ca and/or F-modified samples of LaMnO3 have been prepared by the Pechini method. The bulk structure of samples was characterized by TEM, EXAFS and XRD, while the surface composition was studied by SIMS. Thermal analysis, O2 TPD, H2 TPR and isothermal pulse/flow samples reduction by CO were applied to characterize the accessible surface/bulk oxygen mobility and reactivity. A reasonable description of the experimental energetic spectrum of the surface oxygen for various types of regular and defect surface sites on the perovskite faces was achieved by using semiempirical Interacting Bonds Method in the slab approximation with a due regard for the surface face termination and relaxation. Fluorine was found to decrease the surface coverage by reactive weakly bound oxygen forms while increasing the bulk oxygen excess and mobility. Calcium generated reactive weakly bound oxygen forms while decreasing the oxygen excess in the lattice and converting the regular M-O oxygen forms into the bridging ones through migration to the surface.
Cite:
Sadykov V.A.
, Kuznetsova T.G.
, Simakov A.V.
, Rogov V.A.
, Zaikovskii V.I.
, Moroz E.M.
, Kochubey D.I.
, Novgorodov B.N.
, Ivanov V.P.
, Trukhan S.N.
, Litvak G.S.
, Bulgakov N.N.
, Lunin V.V.
, Kemnitz E.
Effect of Lanthanum Manganite Modification by Calcium and/or Fluorine on the Bonding Strength, Mobility and Reactivity of the Lattice and Surface Oxygen
In compilation Structure-Property Relationships of Oxide Surfaces and Interfaces II: Volume 751 (MRS Proceedings) 1st Edition. – Materials Research Society., 2002. – C.91-96. – ISBN 9781558996885. DOI: 10.1557/PROC-751-Z3.27 WOS Scopus РИНЦ РИНЦ ANCAN OpenAlex
Effect of Lanthanum Manganite Modification by Calcium and/or Fluorine on the Bonding Strength, Mobility and Reactivity of the Lattice and Surface Oxygen
In compilation Structure-Property Relationships of Oxide Surfaces and Interfaces II: Volume 751 (MRS Proceedings) 1st Edition. – Materials Research Society., 2002. – C.91-96. – ISBN 9781558996885. DOI: 10.1557/PROC-751-Z3.27 WOS Scopus РИНЦ РИНЦ ANCAN OpenAlex
Dates:
| Published print: | Jan 1, 2002 |
| Published online: | Feb 11, 2011 |
Identifiers:
| Web of science: | WOS:000183444800015 |
| Scopus: | 2-s2.0-0038037567 |
| Elibrary: | 21501842 | 15036537 |
| Chemical Abstracts: | 2003:453202 |
| Chemical Abstracts (print): | 139:236003 |
| OpenAlex: | W2141324721 |