Specific Features of the Defect Structure of Metastable Nanodisperse Ceria, Zirconia, and Related Materials Научная публикация
Журнал |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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Вых. Данные | Год: 2008, Том: 49, Номер: 6, Страницы: 840-858 Страниц : 19 DOI: 10.1134/S0023158408060098 | ||
Ключевые слова | Zirconium; Unit Cell Parameter; Anionic Vacancy; Pillared Clay; SAXS Data | ||
Авторы |
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Организации |
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Реферат:
Models of the defect structure and microstructure of the CeO2, ZrO2, Ce-Me1-O (Me1 = La, Sm, Zr), and Zr-Me2-O (Me2 = Ca, Sr, Ba) nanomaterials are discussed. For ceria-based fluorite, the appearance of weakly bound oxygen and the mobility of bulk oxygen are due to distortions in the Ce-O coordination sphere and the appearance of interstitial oxygen atoms. For pure and doped zirconia, the phases forming in the intermediate temperature range are characterized by metastable structural networks differing from those observed in the equilibrium phases. The change in the local environment of the Zr cations (eight-atom coordination sphere) from a square antiprism in the initial salts to a distorted fluorite-like polyhedron in zirconia and the principle of structural conformity between hydrolyzed cations and the terminal hydroxyls of the Zr complexes in solution are the factors determining the genesis and structural features of the metastable phases. The defect structure and microstructure of the complex fluorite-like oxides have an effect on the state of the supported active component, favoring the formation of clustered species in the vicinity of extended defects in the support. Some examples of this effect in different types of reactions are provided.
Библиографическая ссылка:
Kuznetsova T.G.
, Sadykov V.A.
Specific Features of the Defect Structure of Metastable Nanodisperse Ceria, Zirconia, and Related Materials
Kinetics and Catalysis. 2008. V.49. N6. P.840-858. DOI: 10.1134/S0023158408060098 WOS Scopus РИНЦ
Specific Features of the Defect Structure of Metastable Nanodisperse Ceria, Zirconia, and Related Materials
Kinetics and Catalysis. 2008. V.49. N6. P.840-858. DOI: 10.1134/S0023158408060098 WOS Scopus РИНЦ
Оригинальная:
Кузнецова Т.Г.
, Садыков В.А.
Особенности дефектной структуры метастабильных нанодисперсных диоксидов церия и циркония и материалов на их основе
Кинетика и катализ. 2008. Т.49. №6. С.886-905. РИНЦ
Особенности дефектной структуры метастабильных нанодисперсных диоксидов церия и циркония и материалов на их основе
Кинетика и катализ. 2008. Т.49. №6. С.886-905. РИНЦ
Даты:
Поступила в редакцию: | 28 мар. 2008 г. |
Опубликована в печати: | 1 нояб. 2008 г. |
Опубликована online: | 3 дек. 2008 г. |
Идентификаторы БД:
Web of science | WOS:000261342700009 |
Scopus | 2-s2.0-57449110157 |
РИНЦ | 13590217 |
Chemical Abstracts | 2008:1443219 |
Chemical Abstracts (print) | 152:460772 |
OpenAlex | W2045613088 |