Spectroelectrochemical studies of uranium and neptunium in LiCl-KCl eutectic melt

I. B. Polovov; C. A. Sharrad; I. May; B. D. Vasin; V. A. Volkovich; T. R. Griffiths

doi:10.1149/1.2798693

Spectroelectrochemical studies of uranium and neptunium in LiCl-KCl eutectic melt

I. B. Polovov, C. A. Sharrad, I. May, B. D. Vasin, V. A. Volkovich, T. R. Griffiths

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Abstract

Experimental set up for spectroelectrochemical measurements was designed. Uranium(III) ions, UCl63-, are formed during anodic dissolution of metallic uranium and prolonged contact of U(IV)-containing melts with uranium metal. UCl4 dissolution in 3LiCl-2KCl melt leads to the formation of UCl62- ions. They undergo a two-step electrochemical reduction: U4+→U3+ recharge followed by U deposition. Neptunium(IV) chloride dissolves in 3LiC1-2KC1 melt producing NpCl62- ions. Electrochemical reduction of Np(TV) on a glassy carbon electrode results in the formation of NpCl6 3- ions and then leads to the deposition of neptunium metal. Electronic absorption spectra of uranium (III, IV, V and VI) and neptunium (III and IV) species in 3LiC1-2KCl eutectic were measured at 450°C. copyright The Electrochemical Society.

Original language	English
Pages (from-to)	503-511
Number of pages	8
Journal	ECS Transactions
Volume	3
Issue number	35
DOIs	https://doi.org/10.1149/1.2798693
Publication status	Published - 2007

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title = "Spectroelectrochemical studies of uranium and neptunium in LiCl-KCl eutectic melt",

abstract = "Experimental set up for spectroelectrochemical measurements was designed. Uranium(III) ions, UCl63-, are formed during anodic dissolution of metallic uranium and prolonged contact of U(IV)-containing melts with uranium metal. UCl4 dissolution in 3LiCl-2KCl melt leads to the formation of UCl62- ions. They undergo a two-step electrochemical reduction: U4+→U3+ recharge followed by U deposition. Neptunium(IV) chloride dissolves in 3LiC1-2KC1 melt producing NpCl62- ions. Electrochemical reduction of Np(TV) on a glassy carbon electrode results in the formation of NpCl6 3- ions and then leads to the deposition of neptunium metal. Electronic absorption spectra of uranium (III, IV, V and VI) and neptunium (III and IV) species in 3LiC1-2KCl eutectic were measured at 450°C. copyright The Electrochemical Society.",

author = "Polovov, {I. B.} and Sharrad, {C. A.} and I. May and Vasin, {B. D.} and Volkovich, {V. A.} and Griffiths, {T. R.}",

year = "2007",

doi = "10.1149/1.2798693",

language = "English",

volume = "3",

pages = "503--511",

journal = "ECS Transactions",

issn = "1938-5862",

publisher = "Electrochemical Society",

number = "35",

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TY - JOUR

T1 - Spectroelectrochemical studies of uranium and neptunium in LiCl-KCl eutectic melt

AU - Polovov, I. B.

AU - Sharrad, C. A.

AU - May, I.

AU - Vasin, B. D.

AU - Volkovich, V. A.

AU - Griffiths, T. R.

PY - 2007

Y1 - 2007

N2 - Experimental set up for spectroelectrochemical measurements was designed. Uranium(III) ions, UCl63-, are formed during anodic dissolution of metallic uranium and prolonged contact of U(IV)-containing melts with uranium metal. UCl4 dissolution in 3LiCl-2KCl melt leads to the formation of UCl62- ions. They undergo a two-step electrochemical reduction: U4+→U3+ recharge followed by U deposition. Neptunium(IV) chloride dissolves in 3LiC1-2KC1 melt producing NpCl62- ions. Electrochemical reduction of Np(TV) on a glassy carbon electrode results in the formation of NpCl6 3- ions and then leads to the deposition of neptunium metal. Electronic absorption spectra of uranium (III, IV, V and VI) and neptunium (III and IV) species in 3LiC1-2KCl eutectic were measured at 450°C. copyright The Electrochemical Society.

AB - Experimental set up for spectroelectrochemical measurements was designed. Uranium(III) ions, UCl63-, are formed during anodic dissolution of metallic uranium and prolonged contact of U(IV)-containing melts with uranium metal. UCl4 dissolution in 3LiCl-2KCl melt leads to the formation of UCl62- ions. They undergo a two-step electrochemical reduction: U4+→U3+ recharge followed by U deposition. Neptunium(IV) chloride dissolves in 3LiC1-2KC1 melt producing NpCl62- ions. Electrochemical reduction of Np(TV) on a glassy carbon electrode results in the formation of NpCl6 3- ions and then leads to the deposition of neptunium metal. Electronic absorption spectra of uranium (III, IV, V and VI) and neptunium (III and IV) species in 3LiC1-2KCl eutectic were measured at 450°C. copyright The Electrochemical Society.

U2 - 10.1149/1.2798693

DO - 10.1149/1.2798693

M3 - Article

VL - 3

SP - 503

EP - 511

JO - ECS Transactions

JF - ECS Transactions

SN - 1938-5862

IS - 35

ER -

Spectroelectrochemical studies of uranium and neptunium in LiCl-KCl eutectic melt

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