Evolution of Bulk and Surface Structures in Stoichiometric LaAlO3 Mixed Oxide Prepared by Using Starch as Template | Sciact - CRIS-system of Boreskov Institute of Catalysis

Evolution of Bulk and Surface Structures in Stoichiometric LaAlO3 Mixed Oxide Prepared by Using Starch as Template Full article

Journal

Materials Chemistry and Physics
ISSN: 0254-0584 , E-ISSN: 1879-3312

Output data

Year: 2018, Volume: 207, Pages: 423-434 Pages count : 12 DOI: 10.1016/j.matchemphys.2017.12.056

Tags

Lanthanum aluminate, Nanocrystalline, Perovskites, Powders, Starch

Authors

Stathopoulos Vassilis N. ¹ , Kuznetsova Tatyana ² , Lapina Olga ^2,3 , Khabibulin Dzhalil ^2,3 , Pandis Pavlos K. ¹ , Krieger Tamara ² , Chesalov Yuri ² , Gulyalev Roman ^2,3 , Krivensov Vladimir ² , Larina Tatyana ² , Sadykov Vladislav ^2,3

Affiliations

1	Laboratory of Chemistry and Materials Technology, Department of Electrical Engineering, School of Technological Applications, Technological Educational Institute of Sterea Ellada, 34400 Psachna campus, Evia, Greece
2	Boreskov Institute of Catalysis, Pr. Lavrentieva, 5, 630090, Novosibirsk, Russian Federation
3	Novosibirsk State University, 630090, Novosibirsk, Russian Federation

Funding (3)

1	European Commission	310750 FP7-NMP-2012-SMALL-6 THEBARCODE
2	Federal Agency for Scientific Organizations	0303-2016-0013
3	The Ministry of Education and Science of the Russian Federation

During the preparation of stoichiometric LaAlO3 type oxide from an aqueous solution of La and Al nitrate salts, using starch as template, a layered intermediate – disordered mixed lanthanum and aluminum hydroxycarbonate exists in the 300-700oC calcination temperature range. According to calcination temperature a variable content of anions/OH is observed as well as changes in the coordination environment of La and Al cations are providing distortions in the structure. The nuclei of LaAlO3 appears within a mixed La-Al hydroxycarbonate matrix at ∼700oC. This phase crystallizes at 900oC after decomposition of the major part of bulk carbonates. The surface layer of perovskite particles formed by stacked nanocrystallites is enriched in La cations and contains residual hydroxyls and carbonates, which results in distortion of the local environment of both cations creating oxygen defect sites as well. Such a microheterogeneity is partly retained up to 1300oC.

Stathopoulos V.N. , Kuznetsova T. , Lapina O. , Khabibulin D. , Pandis P.K. , Krieger T. , Chesalov Y. , Gulyalev R. , Krivensov V. , Larina T. , Sadykov V.
Evolution of Bulk and Surface Structures in Stoichiometric LaAlO3 Mixed Oxide Prepared by Using Starch as Template
Materials Chemistry and Physics. 2018. V.207. P.423-434. DOI: 10.1016/j.matchemphys.2017.12.056 WOS Scopus РИНЦ ANCAN OpenAlex

Published online:	Dec 30, 2017
Published print:	Mar 1, 2018

Web of science:	WOS:000425561000055
Scopus:	2-s2.0-85041480746
Elibrary:	35524085
Chemical Abstracts:	2018:62824
Chemical Abstracts (print):	168:192157
OpenAlex:	W2780288895

DB	Citing
Web of science	12
Scopus	12
Elibrary	9
OpenAlex	11