Abstract: Being stable to carbonization, praseodymium nickelates-cobaltites and their nanocomposites are promising materials for intermediate-temperature solid oxide fuel cells (IT SOFC) cathodes and oxygen separation membranes. This work aims to elucidate specificity of their structure and transport properties on the basis of synchrotron radiation studies. PrNi0.5Co0.5O3-d (PNC), Ce0.9Y0.1O2-d (YDC), Ce0.65Pr0.25Y0.1O2-d (YPDC), CeO2 and PrO2-d powders were synthesized with the Pechini technique. PNC–YDC nanocomposite was obtained via ultrasonic dispersion. The materials were characterized in in situ synchrotron XRD analyses with unit cell volume relaxation (CVR) and extended X-ray absorption fine structure (EXAFS). Bulk and surface oxygen mobility and reactivity were studied with O2 temperature-programmed desorption and CVR methods. Strong cation redistribution between domains was revealed. Fast oxygen diffusion and exchange in the PNC – YDC nanocomposite were shown to be determined by developed interface and variation in the Pr3+/4+ cations’ charge in the Y-Pr-Ce-O domains. Selected compositions were deposited as functional layers in asymmetric membranes for oxygen separation. According to the test results, the membranes demonstrated promising performance.

Cite: Sadykov V.A. , Eremeev N.F. , Vinokurov Z.S. , Shmakov A.N. , Kriventsov V.V. , Lukashevich A.I. , Krasnov A.V. , Ishchenko A.V.
Structural Studies of Pr Nickelate-Cobaltite – Y-Doped Ceria Nanocomposite
Journal of Ceramic Science and Technology. 2017. V.8. N1. P.129-140. DOI: 10.4416/JCST2016-00099 WOS Scopus РИНЦ OpenAlex

Dates:

Submitted:	Oct 31, 2016
Accepted:	Jan 19, 2017
Published print:	Mar 1, 2017

Identifiers:

Web of science:	WOS:000397702900019
Scopus:	2-s2.0-85017030469
Elibrary:	29510836
OpenAlex:	W3137245298

Citing:

DB	Citing
Web of science	12
Scopus	14
Elibrary	11
OpenAlex	26

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