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. // . - 2010. - V. 33, l. 7. - P. 287-296.

ISSN/EISSN:

1938-5862 / нет данных

Type:

Proceedings 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, VCl63-. Vanadium(II) complex ions VCl64- 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, VOCl42-, is the only stable form of V(IV) in fused chlorides. It is formed when V2O5, V2O4 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 Cl-2/Cl-. Further oxidation VO2+ 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 degrees C.

Author keywords:

нет данных

DOI:

10.1149/1.3484786

Web of Science ID:

ISI:000313618000030

Соавторы в МНС:

Другие поля

Поле	Значение
Editor	Fox, DM and Mizuhata, M and DeLong, HC and Mantz, RA and Trulove, PC
Booktitle	MOLTEN SALTS AND IONIC LIQUIDS 17
Series	ECS Transactions
Note	17th International Symposium on Molten Salts and Ionic Liquids as Part of the 218th Meeting of the Electrochemical-Society, Las Vegas, NV, OCT 10-15, 2010
Organization	Electrochem Soc (ECS); Phys \& Analyt Electrochem (PAED); Electrodeposit; Energy Technol (ETD)
Publisher	ELECTROCHEMICAL SOC INC
Address	65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
Language	English
ISBN	978-1-60768-176-2
Research-Areas	Electrochemistry
Web-of-Science-Categories	Electrochemistry
ResearcherID-Numbers	Volkovich, Vladimir/K-8339-2012 Chernyshov, Mikhail/J-9951-2012
ORCID-Numbers	Volkovich, Vladimir/0000-0003-4438-1194 Chernyshov, Mikhail/0000-0002-6982-0600
Number-of-Cited-References	7
Usage-Count-Since-2013	5
Doc-Delivery-Number	BDK82