X-Ray Photoelectron Spectroscopy Investigation of Perovskites La1−x Sr x FeO3−y (0 ≤x < 1.0), Prepared via a Mechanochemical Route Full article
Journal |
Russian Chemical Bulletin
ISSN: 1066-5285 , E-ISSN: 1573-9171 |
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Output data | Year: 2013, Volume: 62, Number: 7, Pages: 1564-1569 Pages count : 6 DOI: 10.1007/s11172-013-0225-8 | ||
Tags | Perovskites, Xray photoelectron spectroscopy | ||
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Abstract:
Perovskite-structure oxides La1−x Sr x FeO3−y (x = 0, 0.2, 0.6, 1) were synthesized by the mechanochemical method. In order to refine the stoichiometric composition and the charge state of ions, these samples were studied by X-ray photoelectron spectroscopy (XPS). An investigation of perovskites with x = 0, 0.2, and 0.6 in air at room temperature showed that these samples do not contain oxygen vacancies (y = 0), i.e., they are fully oxidized. Hence, to produce electrical neutrality, these samples should contain iron(4+) cations in an amount proportional to the degree of substitution (x) of strontium(2+) for lanthanum(3+). However, no Fe4+ cations were found in the oxides. All perovskites contain only Fe3+ cations, oxygen ions O2− along with oxygen ions with reduced electron density (O−). These data provid evidence of the possible electron density redistribution from oxygen ions to iron cations. The fact that the oxides contain oxygen ions with reduced electron density suggests that weakly bound lattice oxygen in substituted perovskites is represented by O− ions.
Cite:
Isupova L.A.
, Prosvirin I.P.
X-Ray Photoelectron Spectroscopy Investigation of Perovskites La1−x Sr x FeO3−y (0 ≤x < 1.0), Prepared via a Mechanochemical Route
Russian Chemical Bulletin. 2013. V.62. N7. P.1564-1569. DOI: 10.1007/s11172-013-0225-8 WOS Scopus РИНЦ
X-Ray Photoelectron Spectroscopy Investigation of Perovskites La1−x Sr x FeO3−y (0 ≤x < 1.0), Prepared via a Mechanochemical Route
Russian Chemical Bulletin. 2013. V.62. N7. P.1564-1569. DOI: 10.1007/s11172-013-0225-8 WOS Scopus РИНЦ
Original:
Исупова Л.А.
, Просвирин И.П.
Исследование методом РФЭС перовскитов La1-xSrxFeO3-y(0 ≤ x < 1.0), приготовленных механохимическим методом
Известия Академии наук. Серия химическая. 2013. №7. С.1564-1569. РИНЦ
Исследование методом РФЭС перовскитов La1-xSrxFeO3-y(0 ≤ x < 1.0), приготовленных механохимическим методом
Известия Академии наук. Серия химическая. 2013. №7. С.1564-1569. РИНЦ
Dates:
Submitted: | Dec 20, 2012 |
Published print: | Jul 1, 2013 |
Published online: | Mar 28, 2014 |
Identifiers:
Web of science | WOS:000333900400012 |
Scopus | 2-s2.0-84898784704 |
Elibrary | 21916826 |
Chemical Abstracts | 2014:516736 |
Chemical Abstracts (print) | 160:565075 |
OpenAlex | W2063210185 |