The effect of the second coordination sphere on vanadium speciation in molten chlorides / Polovov I.B., Chernyshov M.V., Volkovich V.A., Vasin B.D., Griffiths T.R. // ECS Transactions. - 2016. - V. 75, l. 15. - P. 245-253.

ISSN:

19385862

Type:

Conference Paper

Abstract:

Vanadium speciation in a variety of alkali chloride based melts was studied in situ using high temperature electronic absorption spectroscopy. The experimental spectra were resolved into constituent Gaussian bands. Octahedral VCl63- complex ions is the only soluble species of V(III). Oxidation of VCl63- complexes or chlorination of V2O5, V2O4 or V2O3 by hydrogen chloride produces soluble vanadyl-based complexes. The results obtained indicate that the coordination environment of vanadyl-species in NaCl-2CsCl melts is different from the melts containing smaller cations. Anodic dissolution of metallic vanadium in chloride melts produces vanadium(II) ions. Increasing temperature and the mean radius of the salt-solvent cation resulted in changes of the electronic spectra as a result of shifting VCl64-↔VCl42- equilibrium towards the tetrahedral complexes.

Author keywords:

Index keywords:

Absorption spectroscopy; Chemical analysis; Fused salts; Ionic liquids; Ions; Positive ions; Salts; Vanadium compounds; Coordination environment; Coordination sphere; Electronic spectrum; Experimental

DOI:

10.1149/07515.0245ecst

Смотреть в Scopus:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84991376243&doi=10.1149%2f07515.0245ecst&partnerID=40&md5=ea739fca0cb50333997603e33e6d6cca

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Поле	Значение
Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-84991376243&doi=10.1149%2f07515.0245ecst&partnerID=40&md5=ea739fca0cb50333997603e33e6d6cca
Affiliations	Department of Rare Metals and Nanomaterials, Ural Federal University, Ekaterinburg, Russian Federation; Energy Process Developments Ltd, London, United Kingdom
Funding Details	14.581.21.0002, Ministry of Education and Science of the Russian Federation; RFMEFI58114X0002, Ministry of Education and Science of the Russian Federation
Funding Text	The study was financially supported by the Ministry of Education and Science of the Russian Federation within the framework of subsidizing agreement of September 29, 2014 (no. 14.581.21.0002, unique agreement identifier RFMEFI58114X0002) of the Federal Target Program "Research and Development in Priority Directions of the Progress of the Scientific and Technological Complex of Russia for the Years 2014-2020."
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; Chernyshov, M.V., Polovov, I.B., Volkovich, V.A., Rebrin, O.I., Vasin, B.D., Vinogradov, K.V., Griffiths, T.R., (2012) ECS Trans., 50 (11), p. 325; Volkovich, V.A., May, I., Charnock, J.M., Lewin, B., (2002) Phys. Chem. Chem. Phys., 4 (23), p. 5753; Vasin, B.D., Maslov, S.V., Volkovich, V.A., Polovov, I.B., Kazakov, S.A., Rebrin, O.I., (2005) Proc. 7-th Int. Symp. Molten Salts Chem. Techn., 1, p. 335. , P. Taxil, C. Bessada, M. Cassir and M. Gaune-Escard, Editors, Toulouse
Editors	Carter M.Endres F.Biddinger E.J.Reichert M.Ispas A.De Long H.C.Bund A.Haverhals L.M.Mantz R.A.Trulove P.C.Fox D.M.Suroviec A.H.Ueda M.
Publisher	Electrochemical Society Inc.
Conference name	Symposium on Molten Salts and Ionic Liquids 20 - PRiME 2016/230th ECS Meeting
Conference date	2 October 2016 through 7 October 2016
Conference code	124034
ISBN	9781607685395
Language of Original Document	English
Abbreviated Source Title	ECS Transactions
Source	Scopus