Abstract: The phase stability of SrCo0.8Fe0.2O3−d perovskite doped with niobium was studied by in situ high-temperature X-ray diffraction in the temperature range of 30–1000 °C and oxygen partial pressure 0.2–10−5 atm. The stability of the cubic perovskite structure in a wide range of oxygen partial pressures is the main advantage of SrCo0.8−xFe0.2NbxO3−d (x = 0.1–0.3) system in comparison with SrCo0.8Fe0.2O3−d. It is suggested that equilibrium of the thermal expansion with changes of the oxygen non-stoichiometry leading to the same lattice parameters in the oxidizing and reducing environments at the catalytic temperatures is a necessary requirement for stable operation of perovskite as an oxygen-conducting membrane. In the case of SrCo0.8−xFe0.2NbxO3−d perovskite this condition is met at x = 0.2. This makes the SrCo0.6Fe0.2Nb0.2O3−d composition promising for application as oxygen-conducting membrane.

Cite: Podyacheva O.Y. , Ismagilov Z.R. , Shmakov A.N. , Ivanov M.G. , Nadeev A.N. , Tsybulya S.V. , Rogov V.A.
Properties of Nb-Doped SrCo0.8Fe0.2O3-d Perovskites in Oxidizing and Reducing Environments
Catalysis Today. 2009. V.147. N3-4. P.270-274. DOI: 10.1016/j.cattod.2009.01.017 WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Published online:	Feb 18, 2009
Published print:	Oct 15, 2009

Identifiers:

Web of science:	WOS:000270667500016
Scopus:	2-s2.0-69949096637
Elibrary:	15298878
Chemical Abstracts:	2009:1127715
Chemical Abstracts (print):	151:534507
OpenAlex:	W2079724829

Citing:

DB	Citing
Web of science	18
Scopus	18
Elibrary	22
OpenAlex	20

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