Effect of AO Segregation on Catalytical Activity of La0.7A0.3MnO3±δ (A = Ca, Sr, Ba) Regarding Oxygen Reduction Reaction Full article
Journal |
Catalysis Letters
ISSN: 1011-372X , E-ISSN: 1572-879X |
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Output data | Year: 2018, Volume: 148, Number: 9, Pages: 2839-2847 Pages count : 9 DOI: 10.1007/s10562-018-2456-7 | ||||||
Tags | Catalysis; Oxygen reduction reaction; Kinetics; Cation segregation; Manganite | ||||||
Authors |
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Affiliations |
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Funding (4)
1 | The Ministry of Education and Science of the Russian Federation | 02.A03.21.0006 |
2 | Russian Science Foundation | 16-13-00053 |
3 | Council for Grants of the President of the Russian Federation | СП-2316.2018.1 |
4 | Council for Grants of the President of the Russian Federation | МД-6758.2018.3 |
Abstract:
Oxygen surface exchange kinetics of La0.7A0.3MnO3±δ has been studied by the isotope exchange method with gas phase equilibration using a static circulation experimental rig at the temperature of 850 °C and oxygen pressure of 1 kPa. Oxides of La0.7A0.3MnO3±δ with different dopant at one level of doping were considered. Rates of elementary acts of the oxygen exchange were found to change differently. So, the oxygen dissociative adsorption rate increased, the oxygen incorporation rate decreased, and the increase in the cation radius did not influence the interphase exchange rate. These trends are associated with the AO segregation processes at the surface and the appropriate mechanism of oxygen reduction is considered.
Cite:
Porotnikova N.M.
, Eremin V.A.
, Farlenkov A.S.
, Kurumchin E.K.
, Sherstobitova E.A.
, Kochubey D.I.
, Ananyev M.V.
Effect of AO Segregation on Catalytical Activity of La0.7A0.3MnO3±δ (A = Ca, Sr, Ba) Regarding Oxygen Reduction Reaction
Catalysis Letters. 2018. V.148. N9. P.2839-2847. DOI: 10.1007/s10562-018-2456-7 WOS Scopus РИНЦ
Effect of AO Segregation on Catalytical Activity of La0.7A0.3MnO3±δ (A = Ca, Sr, Ba) Regarding Oxygen Reduction Reaction
Catalysis Letters. 2018. V.148. N9. P.2839-2847. DOI: 10.1007/s10562-018-2456-7 WOS Scopus РИНЦ
Dates:
Submitted: | Jan 18, 2018 |
Accepted: | Jun 11, 2018 |
Published online: | Jun 20, 2018 |
Published print: | Sep 1, 2018 |
Identifiers:
Web of science | WOS:000443450900023 |
Scopus | 2-s2.0-85048738234 |
Elibrary | 35713828 |
Chemical Abstracts | 2018:1192794 |
OpenAlex | W2809197915 |