Chemistry of vanadium chlorides in molten salts: An electronic absorption spectroscopy study / Polovov IB,Volkovich VA,Shipulin SA,Maslov SV,Khokhryakov AA,Vasin BD,Griffiths TR,Thied RC // JOURNAL OF MOLECULAR LIQUIDS. - 2003. - V. 103, l. SI. - P. 387-394.

ISSN/EISSN:

0167-7322 / нет данных

Type:

Article; Proceedings Paper

Abstract:

The chloro and oxy-chloro complex ions of vanadium, containing the metal in different oxidation states (II, III, IV and V), were investigated in the melts NaCl-CsCl (at 550 - 700 C) and NaCl-KCl (at 680 - 980 degreesC) under a variety of conditions. Melts were examined using electronic absorption spectroscopy between 4,000 and 33,000 cm(-1). Anodic dissolution of vanadium was studied in NaCl-KCl melts at various anodic current densities. Vanadium dissolves, forming V(II), ions, at current densities of 100-150 mA cm(-2); increasing the current density above ca. 340 mA cm(-2) leads to the formation of predominanily V(III) species. Reactions of vanadium. metal and vanadium oxides (V2O3 and V2O4) with hydrogen chloride or chlorine were followed by in situ spectroscopy; measurements. Depending on the experimental conditions, a range of vanadium chloro- and oxychloro-complexes was formed. Reaction of the V(III) chloro-complex with oxygen-leads to the formation of VO(II) complex 2 ions. Preliminary results indicate that the V(IV) chloro-cornplex, VCl6(2-), can be formed by oxidising VCl63- with chlorine. Vanadium(V) oxide reacts. with hydrogen chloride in NaCl-KCl ,melts to form an oxygen-containing complex of V(III). Direct dissolution of V2O5 in NaCl-KCl melts yields sodium polyvanadate, NaV6O15. (C) 2003 Elsevier Science B.V. All rights reserved.

Author keywords:

vanadium; vanadium oxides; vanadium chlorides; alkali metal chloride melts; chlorination; electronic spectroscopy

DOI:

10.1016/S0167-7322(02)00156-3

Web of Science ID:

ISI:000180874500034

Соавторы в МНС:

Другие поля

Поле	Значение
Month	MAR
Note	27th International Conference on Solution Chemistry, VAALS, NETHERLANDS, AUG 26-31, 2001
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Article-Number	PII S0167-7322(02)00156-3
Research-Areas	Chemistry; Physics
Web-of-Science-Categories	Chemistry, Physical; Physics, Atomic, Molecular \& Chemical
ResearcherID-Numbers	Volkovich, Vladimir/K-8339-2012
ORCID-Numbers	Volkovich, Vladimir/0000-0003-4438-1194
Number-of-Cited-References	6
Usage-Count-Since-2013	7
Journal-ISO	J. Mol. Liq.
Doc-Delivery-Number	643RP