Consistent Interpretation of Isotope and Chemical Oxygen Exchange Relaxation Kinetics in SrFe0.85Mo0.15O3−δ Ferrite | Sciact - CRIS-system of Boreskov Institute of Catalysis

Consistent Interpretation of Isotope and Chemical Oxygen Exchange Relaxation Kinetics in SrFe0.85Mo0.15O3−δ Ferrite Full article

Journal

PCCP: Physical Chemistry Chemical Physics
ISSN: 1463-9076 , E-ISSN: 1463-9084

Output data

Year: 2024, Volume: 26, Number: 14, Pages: 10589-10598 Pages count : 10 DOI: 10.1039/d3cp05441a

Tags

oxide fuel-cells; surface exchange; transport properties; electrical-conductivity; defect chemistry; bulk diffusion; permeation; perovskite; membranes; nonstoichiometry

Authors

Arapova Marina ¹ , Chizhik Stanislav ¹ , Bragina Olga ¹ , Guskov Rostislav ¹ , Sobolev Vladimir ² , Nemudry Alexander ¹

Affiliations

1	Institute of Solid State Chemistry and Mechanochemistry, SB RAS, Kutateladze 18, Novosibirsk, Russia, 630090
2	Boreskov Institute of Catalysis, SB RAS, Lavrentieva 5, Novosibirsk, Russia, 630090

This paper is devoted to the study of phase composition and kinetic and thermodynamic characteristics of Mo-doped strontium ferrite SrFe0.85Mo0.15O3−δ (SFM15) under oxygen-conducting membrane working conditions. Single-phase SFM15 with a cubic Pm[3 with combining macron]m structure was synthesized using a ceramic method. It was shown that the molybdenum introduction stabilizes the perovskite cubic structure over a wide range of oxygen pressures and temperatures, preventing the bulk phase transition at high temperatures. Oxygen exchange constants, diffusion coefficients and activation energy of oxygen exchange were obtained using oxygen relaxation and isotopic exchange techniques, and the obtained values are consistent with known literature data. It was shown that the surface reaction rates obtained using chemical and tracer relaxation methods are quantitatively comparable with each other, despite significantly different experimental conditions. This result not only confirms the reliability of the data obtained by independent methods, but also allows one to expand the area of physical conditions for studying the kinetics of oxygen transfer where another method has technical or methodological limitations.

Arapova M. , Chizhik S. , Bragina O. , Guskov R. , Sobolev V. , Nemudry A.
Consistent Interpretation of Isotope and Chemical Oxygen Exchange Relaxation Kinetics in SrFe0.85Mo0.15O3−δ Ferrite
PCCP: Physical Chemistry Chemical Physics. 2024. V.26. N14. P.10589-10598. DOI: 10.1039/d3cp05441a WOS Scopus РИНЦ AN PMID OpenAlex

Submitted:	Nov 9, 2023
Accepted:	Mar 1, 2024
Published online:	Mar 5, 2024
Published print:	Apr 14, 2024

Web of science:	WOS:001187593100001
Scopus:	2-s2.0-85188531158
Elibrary:	65643306
Chemical Abstracts:	2024:628460
PMID:	38505976
OpenAlex:	W4393107753

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