Physicochemical and Catalytic Properties of Systems Based on CeO2 Review
Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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Output data | Year: 2009, Volume: 50, Number: 6, Pages: 797-815 Pages count : 19 DOI: 10.1134/S0023158409060020 | ||
Tags | Solid Solution; Cerium; Catalytic Property; Platinum Group Metal; Anion Vacancy | ||
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Abstract:
The effect of synthesis conditions, the nature of components, and the ratio between the components on the phase composition, the texture, and the redox and catalytic properties of the Ce-Zr-O, Ce-Zr-M1-O (M1 = Mn, Ni, Cu, Y, La, Pr, or Nd), N/Ce-Zr-O (N = Rh, Pd, or Pt), and Pd/Ce-Zr-M2-O/Al2O3 (M2 = Mg, Ca, Sr, Ba, Y, La, Pr, Nd, or Sm) was considered. A cubic solid solution with the fluorite structure was formed on the introduction of <50 mol % zirconium into CeO2, and the stability of this solid solution depended on preparation procedure and treatment conditions. The presence of transition or rare earth elements in certain concentrations extended the range of compositions with the retained fluorite structure. The texture of the Ce-Zr-O system mainly depended on treatment temperature. An increase in this temperature resulted in a decrease in the specific surface area of the samples. The total pore volume varied over the range of 0.2–0.3 cm3/g and depended on the Ce/Zr ratio. The presence of transition or rare earth elements either increased the specific surface area of the system or made it more stable to thermal treatment. The introduction of the isovalent cation Zr4+ into CeO2 increased the number of lattice defects both on the surface and in the bulk to increase the mobility of oxygen and facilitate its diffusion in the Ce1 − x Zr x O2 lattice. The catalytic properties of the Ce-Zr-M1-O or N/Ce-Zr-M2-O systems were due to the presence of anion vacancies and the easy transitions Ce4+ ai Ce3+, M 1 2n+ ai M 1 n+, and N δ+ → N 0 in the case of noble metals.
Cite:
Ivanova A.S.
Physicochemical and Catalytic Properties of Systems Based on CeO2
Kinetics and Catalysis. 2009. V.50. N6. P.797-815. DOI: 10.1134/S0023158409060020 WOS Scopus РИНЦ
Physicochemical and Catalytic Properties of Systems Based on CeO2
Kinetics and Catalysis. 2009. V.50. N6. P.797-815. DOI: 10.1134/S0023158409060020 WOS Scopus РИНЦ
Original:
Иванова А.С.
Физико-химические и каталитические свойства систем на основе CeO2
Кинетика и катализ. 2009. Т.50. №6. С.831-849. РИНЦ
Физико-химические и каталитические свойства систем на основе CeO2
Кинетика и катализ. 2009. Т.50. №6. С.831-849. РИНЦ
Dates:
Submitted: | Oct 13, 2008 |
Published print: | Nov 1, 2009 |
Published online: | Dec 23, 2009 |
Identifiers:
Web of science | WOS:000274742300002 |
Scopus | 2-s2.0-75749138093 |
Elibrary | 15309446 |
Chemical Abstracts | 2010:34215 |
Chemical Abstracts (print) | 154:241012 |
OpenAlex | W1972514114 |