Influence of the transition to nanoscaled state on electrochemical properties of LaMnO3+delta oxide / Kozhina G. A.,Ermakov A. N.,Fetisov V. B.,Fetisov A. V.,Fishman A. Ya.,Petrova S. A.,Zakharov R. G.,Shunyaev K. Yu.,Rassokhin S. V. // . - 2008. - V. 273-276, l. . - P. 354+.

ISSN/EISSN:

1012-0386 / нет данных

Type:

Proceedings Paper

Abstract:

The electrochemical behavior of perovskite type LaMnO3 (LMO) oxides with different mean particle size was studied by voltammetry with the use of a carbon paste electroactive electrode. Three stages of electrochemical reduction were recognized. The first two of them are related to the release of oxygen from the crystal lattice in the range of two side nonstoichiometry of LaMnO3 +/-delta whereas the final stage is conditioned by the decomposition of LaMnO3-delta into new phases. The nature of these phases and their formation mechanisms are different for nano- and microparticles. The utmost size effect appears on cathodic curves recorded from the stationary potential. The effect is not only due to the size factor but also due to the difference in electrochemical properties of nano- and microparticles. While the decomposition of LaMnO3 microparticles proceeds into La2O3 and MnO oxides, the nanoparticles decompose through the intermediate stage of Mn3O4 formation in accordance with the transformation sequence principle.

Author keywords:

nanocrystalline oxides; voltammetry; nonstoichiometry; reductive dissolution PEROVSKITE-TYPE OXIDES; NONSTOICHIOMETRY; EQUILIBRIUM; DISSOLUTION; REDUCTION; SYSTEM; LN

DOI:

нет данных

Web of Science ID:

ISI:000254387700060

Соавторы в МНС:

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Другие поля

Поле	Значение
Editor	Ochsner, A and Murch, GE
Booktitle	DIFFUSION IN SOLIDS AND LIQUIDS III
Series	Defect and Diffusion Forum
Note	3rd International Conference on Diffusion in Solids and Liquids, Algarve, PORTUGAL, JUL 04-06, 2007
Publisher	TRANS TECH PUBLICATIONS LTD
Address	KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
Language	English
Keywords-Plus	PEROVSKITE-TYPE OXIDES; NONSTOICHIOMETRY; EQUILIBRIUM; DISSOLUTION; REDUCTION; SYSTEM; LN
Research-Areas	Materials Science; Physics
Web-of-Science-Categories	Materials Science, Multidisciplinary; Physics, Applied
Author-Email	gala@usue.ru fetisov@usue.ru fetisovav@mail.ru fishman@ural.ru danaus@mail.ru shun@ural.ru
ResearcherID-Numbers	Petrova, Sofya/A-9157-2014 Shunyaev, Konstantin/A-3916-2014
ORCID-Numbers	Petrova, Sofya/0000-0002-9796-5794 Kozhina, Galina/0000-0001-8103-9510
Funding-Acknowledgement	Russian Foundation for Basic Research {[}06-03-32541-a, 06-03-72003-MNTI-a, 07-03-00-280-a]
Funding-Text	This study was supported by the Russian Foundation for Basic Research (projects No. 06-03-32541-a; No. 06-03-72003-MNTI-a; No 07-03-00-280-a).
Number-of-Cited-References	18
Usage-Count-Since-2013	1
Doc-Delivery-Number	BHM83