Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Oxygen exchange kinetics on La0.6Sr0.4FeO3−δ. / Kovalev, Ivan; Guskov, Rostislav; Gongola, Marko и др.
в: Ceramics International, Том 50, № 7, 01.04.2024, стр. 11855-11861.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Oxygen exchange kinetics on La0.6Sr0.4FeO3−δ
AU - Kovalev, Ivan
AU - Guskov, Rostislav
AU - Gongola, Marko
AU - Popov, Mikhail
AU - Chizhik, Stanislav
AU - Nemudry, Alexander
N1 - This work was supported by the Russian Science Foundation (project No. 22-73-10200 ).
PY - 2024/4/1
Y1 - 2024/4/1
N2 - Equilibrium properties and kinetic properties of strontium-doped lanthanum ferrite La0.6Sr0.4FeO3−δ were studied by an original approach involving two methods: oxygen partial pressure relaxation (with determination of equilibrium exchange rate R0 and a chemical diffusion coefficient in oxide: Dchem) and a quasi-equilibrium oxygen release [with construction of equilibrium isothermal diagram “lg pO2 vs. (3 − δ) vs. T”]. Activation energies determined for R0 and Dchem were 120 ± 20 and 30 ± 2 kJ/mol, respectively. It was shown that the linear free-energy relationship—between activation energy of the reaction rate constant and standard Gibbs energy of the reaction—is of the Brønsted–Evans–Polanyi type.
AB - Equilibrium properties and kinetic properties of strontium-doped lanthanum ferrite La0.6Sr0.4FeO3−δ were studied by an original approach involving two methods: oxygen partial pressure relaxation (with determination of equilibrium exchange rate R0 and a chemical diffusion coefficient in oxide: Dchem) and a quasi-equilibrium oxygen release [with construction of equilibrium isothermal diagram “lg pO2 vs. (3 − δ) vs. T”]. Activation energies determined for R0 and Dchem were 120 ± 20 and 30 ± 2 kJ/mol, respectively. It was shown that the linear free-energy relationship—between activation energy of the reaction rate constant and standard Gibbs energy of the reaction—is of the Brønsted–Evans–Polanyi type.
KW - Continuous homologous series
KW - Lanthanum strontium ferrite
KW - MIEC oxide
KW - Oxygen exchange
KW - Oxygen partial pressure relaxation
KW - Quasi-equilibrium oxygen release
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85182642078&origin=inward&txGid=c701e8a95db4b74fc02455ee9127b64d
UR - https://www.mendeley.com/catalogue/11cdcf92-eec6-31d8-b085-11fca20d8679/
U2 - 10.1016/j.ceramint.2024.01.089
DO - 10.1016/j.ceramint.2024.01.089
M3 - Article
VL - 50
SP - 11855
EP - 11861
JO - Ceramics International
JF - Ceramics International
SN - 0272-8842
IS - 7
ER -
ID: 61085401