EXAFS Study of Nb Doped Sr(Co/Fe)O3–x Perovskites | Sciact - CRIS-система Института катализа

EXAFS Study of Nb Doped Sr(Co/Fe)O3–x Perovskites Научная публикация

Конференция

X-Ray Absorption Fine Structure : 12th International Conference
22-27 июн. 2003 , Malmö/Lund

Журнал

Physica Scripta
ISSN: 0281-1847 , E-ISSN: 0031-8949

Вых. Данные

Год: 2005, Том: T115, Страницы: 740-743 Страниц : 4

Ключевые слова

Electrochemical oxidation; Extended X ray absorption fine structure spectroscopy; Oxygen; Oxygen vacancies; Perovskite; Positive ions

Авторы

Kriventsov V.V. ¹ , Kochubey D.I. ¹ , Ismagilov Z.R. ¹ , Podyacheva O.Yu. ¹ , Nemudry A.P. ²

Организации

1	Boreskov Institute of Catalysis, Lavrentiev prosp. 5, Novosibirsk, 630090, Russia
2	Institute of Solid State Chemistry and Mechanochemistry, Kutateladze 18, Novosibirsk, 630128, Russia

Информация о финансировании (6)

1	International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union	2000-00180
2	North Atlantic Treaty Organization	EST.CLG 979855
3	Российский фонд фундаментальных исследований	03-03-32340
4	Российский фонд фундаментальных исследований	03-03-32192
5	Сибирское отделение Российской академии наук	42
6	Президиум РАН	4.3.6

The local structure of the Fe, Co and Nb surroundings of niobium doped Sr(Co/Fe)O3−x perovskites was studied by EXAFS spectroscopy. The samples were prepared by ceramic method at T = 1250 °C. In order to vary the oxygen content, the samples were (i) slowly cooled in the furnace, (ii) quenched in liquid N2 and electrochemically oxidised. According to EXAFS data, the Nb and Fe cations occupy octahedral positions even at low oxygen content. At the same time, the Co cations seemingly occupy highly distorted octahedral positions. It should be noted that the mean Co–O distance (~1.84 Å) is much shorter than the mean Fe–O (~1.92 Å) distance in this case. It was assumed that oxygen vacancies are mainly located near cobalt cation positions.

Kriventsov V.V. , Kochubey D.I. , Ismagilov Z.R. , Podyacheva O.Y. , Nemudry A.P.
EXAFS Study of Nb Doped Sr(Co/Fe)O3–x Perovskites

Physica Scripta. 2005. V.T115. P.740-743. WOS Scopus РИНЦ CAPlusCA OpenAlex

Поступила в редакцию:	26 июн. 2003 г.
Принята к публикации:	17 дек. 2003 г.

Web of science:	WOS:000204272100223
Scopus:	2-s2.0-42149085601
РИНЦ:	15041088
Chemical Abstracts:	2005:477195
Chemical Abstracts (print):	143:415006
OpenAlex:	W2083717955

БД	Цитирований
Web of science	17
Scopus	19
РИНЦ	20
OpenAlex	18