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|Title:||Rate‐determining steps of oxygen surface exchange kinetics on Sr2Fe1.5Mo0.5O6−δ|
|Authors:||Osinkin, D. A.|
Khodimchuk, A. V.
Porotnikova, N. M.
Bogdanovich, N. M.
Fetisov, A. V.
Ananyev, M. V.
|Citation:||Rate‐determining steps of oxygen surface exchange kinetics on Sr2Fe1.5Mo0.5O6−δ / D. A. Osinkin, A. V. Khodimchuk, N. M. Porotnikova, N. M. Bogdanovich, et al. . — DOI 10.3390/en13010250 // Energies. — 2020. — Vol. 1. — Iss. 13. — 250.|
|Abstract:||The oxygen surface kinetics of Sr2Fe1.5Mo0.5O6−δ was determined using the 16O2/18O2 isotope exchange method with gas phase analysis at 600-800 °C. The heterogeneous exchange rates (rH) and the oxygen diffusion coefficients (D) were calculated by processing the concentration dependences of the 18O fraction using Ezin's model. The rates of oxygen dissociative adsorption (ra) and incorporation (ri) were calculated based on a model using the three exchange type rates. It has been established that the rates ra and ri were comparable in this temperature range. Assumptions were made about the effect of the chemical composition of the surface on the rate of oxygen adsorption. It was found that the oxygen exchange coefficient (k) of Sr2Fe1.5Mo0.5O6−δ is comparable to that of La0.6Sr0.4MnO3±δ oxide. High values of the oxygen diffusion coefficient were found for Sr2Fe1.5Mo0.5O6−δ. The values were comparable to those of the double cobaltite praseodymium-barium and exceed by more than an order those of lanthanum‐strontium manganite. © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).|
|Keywords:||HETEROGENEOUS EXCHANGE RATE|
OXYGEN DIFFUSION COEFFICIENT
OXYGEN SURFACE KINETICS
X‐RAY PHOTOELECTRON SPECTROSCOPY
DIFFUSION IN GASES
OXYGEN DIFFUSION COEFFICIENTS
|metadata.dc.description.sponsorship:||Russian Foundation for Basic Research, RFBR: 00161|
Government Council on Grants, Russian Federation
The study was partly financially supported by the Russian Foundation for Basic Research (17-08-00161) and the Russian Federation Government, agreement 02.A03.21.0006 (no. 211).
|Appears in Collections:||Научные публикации, проиндексированные в SCOPUS и WoS CC|
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