Oxygen isotope exchange and diffusion in LnBaCo(2)O(6-delta) (Ln = Pr, Sm, Gd) with double perovskite structure / Ananyev M. V.,Eremin V. A.,Tsvetkov D. S.,Porotnikova N. M.,Farlenkov A. S.,Zuev A. Yu.,Fetisov A. V.,Kurumchin E. Kh. // SOLID STATE IONICS. - 2017. - V. 304, l. . - P. 96-106.

ISSN/EISSN:

0167-2738 / 1872-7689

Type:

Article

Abstract:

The interaction of oxygen in the gas phase with double perovskites LnBaCo(2)O(6 - delta) (Ln = Pr, Sm, Gd) was studied by the isotope exchange method with gas phase equilibration in the temperature range of 600-850 degrees C and the oxygen pressure range of 1.3 .10(-3)-6.6.10(-2) atm. The oxygen nonstoichiometry of the oxides was determined by means of the thermogravimetric analysis as a function of oxygen partial pressure and temperature in the ranges -3 <= log(Po-2/atm) <= -0.68 and 600 <= T, degrees C <= 850, respectively. The influence of the oxygen nonstoichiometry on the heterogeneous exchange rate and the oxygen tracer diffusion coefficient was discussed. The rate-determining stage of the oxygen surface exchange kinetics for PrBaCo2O6 (-) (delta) was found to be different in comparison with SmBaCo2O6 (-) (delta) and GdBaCo2O6 (-) (delta). The possible reasons of this observation were considered. (C) 2017 Elsevier B.V. All rights reserved.

Author keywords:

Double perovskite; Gas-phase analysis; Oxygen surface exchange; Oxygen tracer diffusion; Solid oxide fuel cells TEMPERATURE ELECTRICAL-PROPERTIES; LANTHANUM-STRONTIUM COBALTITES; OXIDE FUEL-CELLS; TRACER DIFFUSION; SURFACE EXCHANGE; DEFECT STRUCTURE; ION DIFFUSION; KINETICS; NONSTOICHIOMETRY; PRBACO2O5+DELTA

DOI:

10.1016/j.ssi.2017.03.022

Web of Science ID:

ISI:000401390300015

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
EISSN	1872-7689
Keywords-Plus	TEMPERATURE ELECTRICAL-PROPERTIES; LANTHANUM-STRONTIUM COBALTITES; OXIDE FUEL-CELLS; TRACER DIFFUSION; SURFACE EXCHANGE; DEFECT STRUCTURE; ION DIFFUSION; KINETICS; NONSTOICHIOMETRY; PRBACO2O5+DELTA
Research-Areas	Chemistry; Physics
Web-of-Science-Categories	Chemistry, Physical; Physics, Condensed Matter
Author-Email	amv@ihte.uran.ru
ResearcherID-Numbers	Farlenkov, Andrey/C-5426-2014 Porotnikova, Natalia/J-7625-2016 Ananyev, Maxim/F-5104-2014 Zuev, Andrey/E-6220-2014
ORCID-Numbers	Farlenkov, Andrey/0000-0001-5507-7783 Ananyev, Maxim/0000-0002-2254-0193
Funding-Acknowledgement	Russian Foundation of Basic Research {[}14-29-04009]; Russian Science Foundation {[}16-13-00053]; Act 211 of Government of the Russian Federation {[}02.A03.21.0006]; Russian Federation {[}CPi-1572.2015.1, CPi-1663.2015.1]
Funding-Text	The facilities of the shared access centers ``Composition of Compounds{''} of IHTE UB RAS and ``Ural-M{''} of IMET UB RAS were used in this work. The authors thank B.D. Antonov for XRD measurements, N.G. Molchanova for ICP-AES analysis and A.A. Pankratov for SEM-EDX analysis. This work is partly supported by the Russian Foundation of Basic Research (Project No. 14-29-04009) and Russian Science Foundation (Project No. 16-13-00053); supported by Act 211 of Government of the Russian Federation, agreement No 02.A03.21.0006 and grants of the President of Russian Federation 2015-2017 (No. C Pi-1572.2015.1, C Pi-1663.2015.1).
Number-of-Cited-References	46
Usage-Count-Last-180-days	14
Usage-Count-Since-2013	14
Journal-ISO	Solid State Ion.
Doc-Delivery-Number	EU9WL