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The Formation of Structural Defects in the Ce-Sm-O and Ce-Sm-O/Ru Nanosystems Synthesized by the Sol-Gel Method Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Translated
Journal Russian Journal of Physical Chemistry A
ISSN: 0036-0244 , E-ISSN: 1531-863X
Output data Year: 2005, Volume: 79, Number: 8, Pages: 1187-1191 Pages count : 5
Authors Ivanovskaya M.I. , Frolova E.V. , Sadykov V.A. , Neophytides S.
Affiliations
1 Boreskov Institute of Catalysis SB RAS
2 Institute of Chemical Engineering and High Temperature Chemical Processes
3 Belarusian State University

Abstract: The structure of Ce-Sm-O and Ce-Sm-O/Ru samples with 5, 10, and 15 at % Sm synthesized by the inorganic sol-gel method was characterized by EPR, X-ray diffraction, and electron microscopy. The thermal dehydration of xerogels of the products of cohydrolysis of Ce(IV) and Sm(IH) at 600-800 degrees C results in the formation of a structure on the basis of cubic CeO2 with particle sizes less than 10 rim. The EPR spectra of Ce-Sm-O contain signals of the Ce3+ (g(perpendicular to) = 1.966 and g(parallel to) = 1.947) and [SmOn-V-O] (g(parallel to) = 1.996-1.998 and g(perpendicular to) = 1.973-1.974) centers with different coordination environment symmetries. The introduction of Sm(III) decreases the concentration of volume Ce3+ centers to a greater degree the higher the content of Sm(III). After deposition of Ru(IV), the concentration of Ce3+ increases substantially, by one to two orders of magnitude, and surface Ce3+ ions appear (g(perpendicular to) = 1.966 and g(parallel to) = 1.940). Synthesis through the step of sol formation ensures homogeneous distribution of 10% Sm in the crystal lattice of CeO2.
Cite: Ivanovskaya M.I. , Frolova E.V. , Sadykov V.A. , Neophytides S.
The Formation of Structural Defects in the Ce-Sm-O and Ce-Sm-O/Ru Nanosystems Synthesized by the Sol-Gel Method
Russian Journal of Physical Chemistry A. 2005. V.79. N8. P.1187-1191. publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
ArticleLinkType.TRANSLATED_TO_ORIGINAL: Ивановская М.И. , Фролова Е.В. , Садыков В.А. , Неофитидес С.
Формирование структурных дефектов в наносистемах Ce-Sm-O и Ce-Sm-O/Ru, синтезированных золь-гель-методом
Журнал физической химии. 2005. Т.79. №8. С.1351-1356. publication_identifier_short.rsci_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Published print: Aug 1, 2005
Identifiers:
publication_identifier.wos_identifier_type WOS:000230855900001
publication_identifier.scopus_identifier_type 2-s2.0-24644467853
publication_identifier.rinz_identifier_type 13497745
publication_identifier.accession_number_identifier_type 2005:702367
publication_identifier.chemical_accession_number_identifier_type 144:278422