Electrochemical studies on cerium(III) in molten fluoride mixtures

Popescu, Alina; Olteanu, M

doi:10.1016/s1002-0721(09)60127-7

Cited by 19 publications

(8 citation statements)

References 10 publications

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“…That is due to the relatively higher stability of the complex ions of higher valance cations with the fluoride ion (F − ), compared to lower valance cations (Ce 2+ , Ce 3+ ). 13,28 The results were confirmed by inductive coupled plasma-atomic emission spectroscopy (ICP-AES) analysis. Results illustrated that the concentration of cerium ions has decreased 0.16% comparing with the initial concentration of CeCl 3 that added in the melt.…”

Section: Ce (Iii)mentioning

confidence: 73%

Electrochemical Behaviors of Ce(III) in Molten AlCl₃-NaCl under Various Contents of Fluoride

Song

Zhang

Mukherjee

2016

J. Electrochem. Soc.

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The electrochemical behavior of CeCl 3 was investigated in molten AlCl 3 -NaCl melt with various concentrations of fluoride anions using molybdenum electrode at a temperature of 473 K. Transient electrochemical techniques, such as cyclic voltammetry and square wave voltammetry, were performed to reveal the diffusion coefficients of the electroactive species and reduction steps. Results suggest that there are two steps for Ce(III) ion reduction in molten AlCl 3 -NaCl: Ce(III)→Ce(II) and Ce(II)→Ce. The reduction processes shifted to Ce(III)→Ce when NaF was added in the melt in increasing amount. The molar ratio of fluoride ions and cerium (F/Ce ratio) was employed as a parameter to illustrate the influence of fluoride anions. The diffusion coefficient of electroactive species were determined in AlCl 3 -NaCl melt at 473 K by using square wave voltammetry.

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Section: Ce (Iii)mentioning

confidence: 73%

Electrochemical Behaviors of Ce(III) in Molten AlCl₃-NaCl under Various Contents of Fluoride

Song

Zhang

Mukherjee

2016

J. Electrochem. Soc.

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“…The trend shown in Fig. 9 is described by log D ceðIIIÞ ¼ À2:43 À 1952=T D CeðIIIÞ : cm 2 s À1 À Á [7] or in exponential form…”

Section: Resultsmentioning

confidence: 98%

“…Constantin et al 7 investigated cerium in molten fluoride mixtures, LiF-NaF and LiF-NaF-CaF2, and instead of the quasi-reversible behavior in LiCl-KCl, found a reversible, single-step reaction involving three electrons.…”

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confidence: 99%

Evaluation of the Electrochemical Behavior of CeCl3 in Molten LiCl-KCl Eutectic Utilizing Metallic Ce as an Anode

Marsden

Pešić

2011

J. Electrochem. Soc.

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A study of the electrochemical behavior of CeCl 3 in LiCl-KCl eutectic was performed in the temperature range 653-973K to ascertain if CeCl 3 is a suitable surrogate for UCl 3 in the development of nuclear fuel cycle technologies. Reduction of cerium occurs in a single 3-electron step that is quasi-reversible. The diffusion coefficient of Ce(III) was determined by linear sweep voltammetry and chronopotentiometry. The standard potential of Ce(III)/Ce(0) was measured and used to calculate Gibbs free energy and the activity coefficient. The nucleation of cerium on a tungsten substrate was determined to be instantaneous with hemispherical nuclei whose growth is controlled by linear or hemispherical diffusion. The order of magnitude of the exchange current density was determined by the linear polarization method. The electrochemical characteristics of CeCl 3 were compared with those of UCl 3 in LiCl-KCl to evaluate the potential of cerium as a surrogate for uranium electrorefining development.

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“…19 An important factor in A c c e p t e d M a n u s c r i p t 3 these developments is the availability of high purity materials inert toward molten fluorides (boron nitride, pyrolitic boron nitride and glassy carbon) for the design of new sample containers. Nuclear magnetic resonance (NMR) spectroscopy, 20,21 extended X-ray fine absorption spectroscopy, 22,23 Raman spectroscopy, 24 electrochemistry, 25,26 thermodynamics studies, 27,28,29 etc. have thus beneficiated a new impulse.…”

Section: Introductionmentioning

confidence: 99%

Evidence of dynamical local scale distribution heterogeneities in CsF-AF (A=Li, Na, K and Rb) molten salts

Rollet

Bessada

2015

Journal of Fluorine Chemistry

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International audienceThe local structure of molten CsF-AF (A = Li, Na, K and Rb) has been studied by high temperature Nuclear Magnetic Resonance (NMR) spectroscopy. The 19F and 133Cs chemical shifts have been measured as a function of the molar fraction of CsF. 19F chemical shift varies linearly with composition while 133Cs chemical shift presents a break around the eutectics composition. Furthermore, in molten CsF-LiF at high CsF concentration, 133Cs chemical shift is nearly constant. The evolutions of 19F and 133Cs chemical shifts versus CsF-AF composition have been interpreted as a signature of dynamical local scale distribution heterogeneities

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Electrochemical studies on cerium(III) in molten fluoride mixtures

Cited by 19 publications

References 10 publications

Electrochemical Behaviors of Ce(III) in Molten AlCl₃-NaCl under Various Contents of Fluoride

Electrochemical Behaviors of Ce(III) in Molten AlCl₃-NaCl under Various Contents of Fluoride

Evaluation of the Electrochemical Behavior of CeCl3 in Molten LiCl-KCl Eutectic Utilizing Metallic Ce as an Anode

Evidence of dynamical local scale distribution heterogeneities in CsF-AF (A=Li, Na, K and Rb) molten salts

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Electrochemical studies on cerium(III) in molten fluoride mixtures

Cited by 19 publications

References 10 publications

Electrochemical Behaviors of Ce(III) in Molten AlCl3-NaCl under Various Contents of Fluoride

Electrochemical Behaviors of Ce(III) in Molten AlCl3-NaCl under Various Contents of Fluoride

Evaluation of the Electrochemical Behavior of CeCl3 in Molten LiCl-KCl Eutectic Utilizing Metallic Ce as an Anode

Evidence of dynamical local scale distribution heterogeneities in CsF-AF (A=Li, Na, K and Rb) molten salts

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Electrochemical Behaviors of Ce(III) in Molten AlCl₃-NaCl under Various Contents of Fluoride

Electrochemical Behaviors of Ce(III) in Molten AlCl₃-NaCl under Various Contents of Fluoride