Standard

Oxygen stoichiometry and isotope exchange of oxides Ba0.5Sr0.5Co0.8Fe0.2O3−δ doped with Ta, Nb, Mo or W. / Akhmadeev, Albert; Eremin, V. A.; Ananyev, M. V. et al.
In: Applied Surface Science, No. 629, 157312, 30.08.2023.

Research output: Contribution to journal › Article › peer-review

Harvard

Akhmadeev, A, Eremin, VA, Ananyev, MV, Voloshin, BV, Popov, MP, Ivanov, IL & Fetisov, AV 2023, 'Oxygen stoichiometry and isotope exchange of oxides Ba0.5Sr0.5Co0.8Fe0.2O3−δ doped with Ta, Nb, Mo or W', Applied Surface Science, no. 629, 157312. https://doi.org/10.1016/j.apsusc.2023.157312

APA

Akhmadeev, A., Eremin, V. A., Ananyev, M. V., Voloshin, B. V., Popov, M. P., Ivanov, I. L., & Fetisov, A. V. (2023). Oxygen stoichiometry and isotope exchange of oxides Ba0.5Sr0.5Co0.8Fe0.2O3−δ doped with Ta, Nb, Mo or W. Applied Surface Science, (629), [157312]. https://doi.org/10.1016/j.apsusc.2023.157312

Vancouver

Akhmadeev A, Eremin VA, Ananyev MV, Voloshin BV, Popov MP, Ivanov IL et al. Oxygen stoichiometry and isotope exchange of oxides Ba0.5Sr0.5Co0.8Fe0.2O3−δ doped with Ta, Nb, Mo or W. Applied Surface Science. 2023 Aug 30;(629):157312. doi: 10.1016/j.apsusc.2023.157312

Author

Akhmadeev, Albert ; Eremin, V. A. ; Ananyev, M. V. et al. / Oxygen stoichiometry and isotope exchange of oxides Ba0.5Sr0.5Co0.8Fe0.2O3−δ doped with Ta, Nb, Mo or W. In: Applied Surface Science. 2023 ; No. 629.

BibTeX

@article{60bddd0a60164dd79f18b1a99c493079,
title = "Oxygen stoichiometry and isotope exchange of oxides Ba0.5Sr0.5Co0.8Fe0.2O3−δ doped with Ta, Nb, Mo or W",
abstract = "This study focuses on the oxygen exchange kinetics and the oxygen diffusivity of the Ba0.5Sr0.5Co0.8Fe0.2O3−δ oxides doped with high-charged cations M = Ta, Nb, Mo or W and factors governing the oxygen vacancies mobility and surface exchange activity. The dependence of oxygen content in Nb-doped oxide has been investigated as the function of oxygen pressure and temperature within the ranges of − 4.5 ≤ log(Po2/P0o2) ≤ − 0.7 and 600–900 °C by means of the quasi-equilibrium oxygen release method. Based on «T − Po2 – δ» diagrams the modelling of point defect equilibrium has been performed. The composition and morphology of the surface of all the oxides have been studied by the X-ray photoelectron spectroscopy (XPS) and the scanning electron microscopy (SEM), respectively. The kinetics of interaction of gas phase oxygen with the oxides has been explored by the isotope exchange method with gas phase equilibration (IE-GPE) in the temperature range of 600–800 °C and the oxygen pressure at 6.7 mbar. All the oxides have been divided into two groups with respect to the type of rate-determining step of oxygen surface exchange process, while the strong dependence of oxygen vacancy mobility on dopant concentration has been found. The obtained experimental data and proposed models of point defect equilibrium allowed to reveal the factors governing oxygen diffusion and oxygen surface exchange mechanism in series of oxides.",
author = "Albert Akhmadeev and Eremin, {V. A.} and Ananyev, {M. V.} and Voloshin, {B. V.} and Popov, {Mikhail P.} and Ivanov, {Ivan L.} and Fetisov, {A. V.}",
note = "The facilities of the shared access centers “Composition of Compounds” of IHTE UB RAS and “Ural-M” of IMET UB RAS as well as Unique scientific setup “Isotopic Exchange” of IHTE UB RAS were used in this work. A.R. Akhmadeev, V.A. Eremin and M.V. Ananyev are grateful to project no. 23-05-5.1-1. The work is partly performed in the framework of the development program “Priority-2030” of the Mendeleev University of Chemical Technology of Russia. V.A. Eremin is also grateful to government assignment no. AAAA–A19–119110190048–7 for ISSC UB RAS. The authors would like to thank A.V. Khodimchuk, A.S. Farlenkov, A.V. Khrustov and N.G. Molchanova for the assistance in the study; Eremina E.S. for proofreading the manuscript.",
year = "2023",
month = aug,
day = "30",
doi = "10.1016/j.apsusc.2023.157312",
language = "English",
journal = "Applied Surface Science",
issn = "0169-4332",
publisher = "Elsevier BV",
number = "629",

}

RIS

TY - JOUR

T1 - Oxygen stoichiometry and isotope exchange of oxides Ba0.5Sr0.5Co0.8Fe0.2O3−δ doped with Ta, Nb, Mo or W

AU - Akhmadeev, Albert

AU - Eremin, V. A.

AU - Ananyev, M. V.

AU - Voloshin, B. V.

AU - Popov, Mikhail P.

AU - Ivanov, Ivan L.

AU - Fetisov, A. V.

N1 - The facilities of the shared access centers “Composition of Compounds” of IHTE UB RAS and “Ural-M” of IMET UB RAS as well as Unique scientific setup “Isotopic Exchange” of IHTE UB RAS were used in this work. A.R. Akhmadeev, V.A. Eremin and M.V. Ananyev are grateful to project no. 23-05-5.1-1. The work is partly performed in the framework of the development program “Priority-2030” of the Mendeleev University of Chemical Technology of Russia. V.A. Eremin is also grateful to government assignment no. AAAA–A19–119110190048–7 for ISSC UB RAS. The authors would like to thank A.V. Khodimchuk, A.S. Farlenkov, A.V. Khrustov and N.G. Molchanova for the assistance in the study; Eremina E.S. for proofreading the manuscript.

PY - 2023/8/30

Y1 - 2023/8/30

N2 - This study focuses on the oxygen exchange kinetics and the oxygen diffusivity of the Ba0.5Sr0.5Co0.8Fe0.2O3−δ oxides doped with high-charged cations M = Ta, Nb, Mo or W and factors governing the oxygen vacancies mobility and surface exchange activity. The dependence of oxygen content in Nb-doped oxide has been investigated as the function of oxygen pressure and temperature within the ranges of − 4.5 ≤ log(Po2/P0o2) ≤ − 0.7 and 600–900 °C by means of the quasi-equilibrium oxygen release method. Based on «T − Po2 – δ» diagrams the modelling of point defect equilibrium has been performed. The composition and morphology of the surface of all the oxides have been studied by the X-ray photoelectron spectroscopy (XPS) and the scanning electron microscopy (SEM), respectively. The kinetics of interaction of gas phase oxygen with the oxides has been explored by the isotope exchange method with gas phase equilibration (IE-GPE) in the temperature range of 600–800 °C and the oxygen pressure at 6.7 mbar. All the oxides have been divided into two groups with respect to the type of rate-determining step of oxygen surface exchange process, while the strong dependence of oxygen vacancy mobility on dopant concentration has been found. The obtained experimental data and proposed models of point defect equilibrium allowed to reveal the factors governing oxygen diffusion and oxygen surface exchange mechanism in series of oxides.

AB - This study focuses on the oxygen exchange kinetics and the oxygen diffusivity of the Ba0.5Sr0.5Co0.8Fe0.2O3−δ oxides doped with high-charged cations M = Ta, Nb, Mo or W and factors governing the oxygen vacancies mobility and surface exchange activity. The dependence of oxygen content in Nb-doped oxide has been investigated as the function of oxygen pressure and temperature within the ranges of − 4.5 ≤ log(Po2/P0o2) ≤ − 0.7 and 600–900 °C by means of the quasi-equilibrium oxygen release method. Based on «T − Po2 – δ» diagrams the modelling of point defect equilibrium has been performed. The composition and morphology of the surface of all the oxides have been studied by the X-ray photoelectron spectroscopy (XPS) and the scanning electron microscopy (SEM), respectively. The kinetics of interaction of gas phase oxygen with the oxides has been explored by the isotope exchange method with gas phase equilibration (IE-GPE) in the temperature range of 600–800 °C and the oxygen pressure at 6.7 mbar. All the oxides have been divided into two groups with respect to the type of rate-determining step of oxygen surface exchange process, while the strong dependence of oxygen vacancy mobility on dopant concentration has been found. The obtained experimental data and proposed models of point defect equilibrium allowed to reveal the factors governing oxygen diffusion and oxygen surface exchange mechanism in series of oxides.

UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85158905664

UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=001001325900001

U2 - 10.1016/j.apsusc.2023.157312

DO - 10.1016/j.apsusc.2023.157312

M3 - Article

JO - Applied Surface Science

JF - Applied Surface Science

SN - 0169-4332

IS - 629

M1 - 157312

ER -

ID: 39234135