(Ln1.8Fe0.2)FeSbO7 (Ln = Pr–Tb) Mixed Oxides with the Pyrochlore Structure in CO Oxidation Reaction
- Authors: Ellert O.G.1, Egorysheva A.V.1, Liberman E.Y.2, Golodukhina S.V.1, Kirdyankin D.I.1, Gajtko O.M.1
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Affiliations:
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences
- Mendeleev University of Chemical Technology
- Issue: Vol 55, No 12 (2019)
- Pages: 1257-1263
- Section: Article
- URL: https://journals.rcsi.science/0020-1685/article/view/158815
- DOI: https://doi.org/10.1134/S0020168519120033
- ID: 158815
Cite item
Abstract
(Ln1.8Fe0.2)FeSbO7 (Ln = Pr–Tb) mixed oxides have been synthesized via coprecipitation followed by annealing. According to Rietveld refinement results, all of the oxides have the pyrochlore structure (sp. gr. Fd\(\bar {3}\)mz). The (Ln1.8Fe0.2)FeSbO7 compounds have been shown to exhibit high activity for CO oxidation reaction. The best results have been obtained for (Pr1.8Fe0.2)FeSbO7, which has a 90% CO conversion temperature T90 = 385°C. With increasing lanthanide atomic number, T90 rises monotonically from 385 to 550°C in going from Pr to Tb. This behavior is most likely due to the decrease of structural imperfection in the compounds with smaller lanthanide ionic radii.
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About the authors
O. G. Ellert
Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences
Author for correspondence.
Email: oellert@yandex.ru
Russian Federation, Leninskii pr. 31, Moscow, 119991
A. V. Egorysheva
Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences
Email: oellert@yandex.ru
Russian Federation, Leninskii pr. 31, Moscow, 119991
E. Yu. Liberman
Mendeleev University of Chemical Technology
Email: oellert@yandex.ru
Russian Federation, Miusskaya pl. 9, Moscow, 125047
S. V. Golodukhina
Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences
Email: oellert@yandex.ru
Russian Federation, Leninskii pr. 31, Moscow, 119991
D. I. Kirdyankin
Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences
Email: oellert@yandex.ru
Russian Federation, Leninskii pr. 31, Moscow, 119991
O. M. Gajtko
Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences
Email: oellert@yandex.ru
Russian Federation, Leninskii pr. 31, Moscow, 119991
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