Electronic absorption spectra of vanadium species in halide melts / Chernyshov M.V., Polovov I.B., Volkovich V.A., Vasin B.D., Rebrin O.I., Vonogradov K.V., Griffiths T.R. // ECS Transactions. - 2010. - V. 33, l. 7. - P. 287-296.

ISSN:

19385862

Type:

Conference Paper

Abstract:

Physico-chemical behavior of vanadium in chloride melts was studied using high temperature electronic absorption spectroscopy and spectroelectrochemistry. Dissolution of VCl3 in molten chloride leads to the formation V(III) species, VCl6 3-. Vanadium(II) complex ions VCl 6 4- are formed during electroreduction of vanadium(III)-containing melts and vanadium metal anodic dissolution. V(II) chloro-species slowly react with silica to form an oxygen-containing insoluble phase. Due to high volatility of VCl4 oxygen-containing vanadyl species, VOCl4 2-, is the only stable form of V(IV) in fused chlorides. It is formed when V2O5, V 2O4 or V2O3 react with HCl. Electroreduction of vanadyl complexes leads to the formation of insoluble oxygen-containing vanadium(III)species, whereas electrochemical oxidation has no effect on vanadium speciation, VO3+/VO2+ red-ox potential is more positive than Cl2/Cl-. Further oxidation VO 2+ species gives vanadate anions. The electronic absorption spectra of soluble vanadium species were measured in 3LiCl-2KCl, NaCl-KCl and NaCl-2CsCl mixtures at 450-750 °C. ©The Electrochemical Society.

Author keywords:

Index keywords:

Anodic dissolution; Chloride melt; Complex ions; Electro reduction; Electronic absorption spectra; Halide melts; High volatility; High-temperature electronics; Molten chlorides; Physico-chemicals; Sta

DOI:

10.1149/1.3484786

Смотреть в Scopus:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-79952690160&doi=10.1149%2f1.3484786&partnerID=40&md5=cb4be67c18f453fb5562ea3739a8e7b7

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Другие поля

Поле	Значение
Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-79952690160&doi=10.1149%2f1.3484786&partnerID=40&md5=cb4be67c18f453fb5562ea3739a8e7b7
Affiliations	Department of Rare Metals and Nanomaterials, Ural Federal University, Ekaterinburg, 620002, Russian Federation; Redston Trevor Consulting, Ltd., Leeds, LS17 8RF, United Kingdom
References	Hurrington, G., Sundheim, B.R., (1960) Ann. N. Y. Acad. Sci., 79, p. 950; Molina, R., (1961) Bull. Soc. Chim. Fr., p. 301; Gruen, D.M., McBeth, R.L., (1962) J. Phys. Chem., 66, p. 57; Gruen, D.M., McBeth, R.L., (1963) Pure Appl. Chem., 6, p. 23; Vasin, B.D., Maslov, S.V., Polovov, I.B., (1999) Rasplavy, (2), p. 51; Polovov, I.B., Volkovich, V.A., Shipulin, S.A., Maslov, S.V., Khokhryakov, A.A., Vasin, B.D., Griffiths, T.R., Thied, R.C., (2003) J. Mol. Liquids, 105, p. 105; Vasin, B.D., Polovov, I.B., Volkovich, V.A., Griffiths, T.R., Berezin, A.V., (2006) Molten Salts XIV/2004, p. 261. , R. A. Mantz, P. C. Trulove, H. C. De Long, G. R. Stafford, M. Hagiwara, and D. A. Costa, Editors, PV 2004-24, The Electrochemical Society, Pennington, NJ
Correspondence Address	Chernyshov, M. V.; Department of Rare Metals and Nanomaterials, Ural Federal University, Ekaterinburg, 620002, Russian Federation
Sponsors	Physical and Analytical Electrochemistry;Electrodeposition;Energy Technology
Conference name	17th International Symposium on Molten Salts and Ionic Liquids - 218th ECS Meeting
Conference date	10 October 2010 through 15 October 2010
Conference location	Las Vegas, NV
Conference code	84199
ISBN	9781566778268
Language of Original Document	English
Abbreviated Source Title	ECS Transactions
Source	Scopus