2017
DOI: 10.1149/2.0201708jes
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Vanadium Speciation in Fused Alkali Chlorides

Abstract: Electronic absorption spectra of vanadium ions were recorded between 450 and 750 • C in 3LiCl-2KCl, NaCl-KCl and NaCl-2CsCl based melts. Analysis of the spectra showed that vanadium in the oxidation states of +2 and +3 is present in the melts as complex chloro-ions. Vanadium(II) can form the complex ions in octahedral and tetrahedral coordination, the latter being favored by higher temperatures. Only six-coordinated V(III) ions were observed. Vanadium in the oxidation state of +4 can be present in chloride mel… Show more

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Cited by 3 publications
(10 citation statements)
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“…The recorded calculated and peak potentials were more than one volt anodic to the equilibrium potential of aluminium in the electrolyte used and therefore had to be attributed to the reversible reactions of the remaining constituents of the electrolyte. Chlorine evolution was found to start at potentials more positive than 2.000 V vs. Al and it is known that sodium equilibrium potential in chloride melts is substantially more negative than that of aluminium [15,16]. The recorded equilibrium and peak potentials, therefore, had to be attributed to vanadium species in metallic and ionized forms.…”
Section: Vanadium Dissolution and Deposition In Equimolar Alcl 3 + Nacl Meltmentioning
confidence: 98%
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“…The recorded calculated and peak potentials were more than one volt anodic to the equilibrium potential of aluminium in the electrolyte used and therefore had to be attributed to the reversible reactions of the remaining constituents of the electrolyte. Chlorine evolution was found to start at potentials more positive than 2.000 V vs. Al and it is known that sodium equilibrium potential in chloride melts is substantially more negative than that of aluminium [15,16]. The recorded equilibrium and peak potentials, therefore, had to be attributed to vanadium species in metallic and ionized forms.…”
Section: Vanadium Dissolution and Deposition In Equimolar Alcl 3 + Nacl Meltmentioning
confidence: 98%
“…Vanadium ions were added to the equimolar electrolyte by dissolution of the vanadium working electrode. There are several studies on the vanadium ions being present in the chloride melts (NaCl + KCl at 690 to 860 °C) [15,16]. The equilibrium potentials of the reactions: V(II) ↔ V(0), V(III) ↔ V(II), Cl − + 2e − ↔ Cl2, were established [15,16].…”
Section: Vanadium Dissolution and Deposition In Equimolar Alcl 3 + Nacl Meltmentioning
confidence: 99%
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