Synthesis and Characterization of Fluorite-Like Ce–Zr–Y–La–O Systems Full article
Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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Output data | Year: 2005, Volume: 46, Number: 6, Pages: 884-890 Pages count : 7 DOI: 10.1007/s10975-005-0152-2 | ||
Tags | Precipitation; Solid Solution; Specific Surface; Calcination; Yttrium | ||
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Abstract:
Ce-Zr-O and Ce-Zr-Y-La-O materials obtained under various conditions and at varying component ratios are characterized. At Ce/Zr ≈ 1, a tetragonal phase that can hardly be distinguished from a cubic phase by X-ray diffraction forms in the ternary system. Raising the precipitation temperature favors the formation of two-phase systems. Promoting the Ce/Zr = 0.26–0.62 materials with both yttrium and lanthanum favors the formation of a single-phase specimen, namely, a (Ce, Zr, Y, La)O2 fluorite-like solid solution at 600°C. This structure persists up to 1150°C. The specific surface area of the (Ce, Zr, Y, La)O2 materials is primarily determined by their calcination temperature: S sp = 50–80 m2/g at 600°C and 0.6–0.8 m2/g at 1150° C. The specimens calcined at 600°C are mesoporous, with uniformly sized pores of mean diameter 32 ± 2 Å, and have no micropores. According to TPR data, the specimens calcined at 600°C are reduced with hydrogen in two steps that can apparently be interpreted as surface and bulk reduction. The Ce/Zr = 0.26 and 0.40 specimens calcined at 1150°C are reduced in a single step, giving rise to TPR peaks at 707 and 686°C, respectively, and their degree of reduction increases with decreasing Ce/Zr.
Cite:
Turko G.A.
, Ivanova A.S.
, Plyasova L.M.
, Litvak G.S.
, Rogov V.A.
Synthesis and Characterization of Fluorite-Like Ce–Zr–Y–La–O Systems
Kinetics and Catalysis. 2005. V.46. N6. P.884-890. DOI: 10.1007/s10975-005-0152-2 WOS Scopus РИНЦ
Synthesis and Characterization of Fluorite-Like Ce–Zr–Y–La–O Systems
Kinetics and Catalysis. 2005. V.46. N6. P.884-890. DOI: 10.1007/s10975-005-0152-2 WOS Scopus РИНЦ
ArticleLinkType.TRANSLATED_TO_ORIGINAL:
Турко Г.А.
, Иванова А.С.
, Плясова Л.М.
, Литвак Г.С.
, Рогов В.А.
Синтез и исследование систем Ce-Zr-Y-La-O со структурой флюорита
Кинетика и катализ. 2005. Т.46. №6. С.932-939. RSCI РИНЦ
Синтез и исследование систем Ce-Zr-Y-La-O со структурой флюорита
Кинетика и катализ. 2005. Т.46. №6. С.932-939. RSCI РИНЦ
Dates:
Submitted: | Jul 14, 2004 |
Published print: | Nov 1, 2005 |
Identifiers:
Web of science | WOS:000234409400017 |
Scopus | 2-s2.0-30344466384 |
Elibrary | 13492890 |
Chemical Abstracts | 2006:18592 |
Chemical Abstracts (print) | 145:172539 |
OpenAlex | W2020350520 |