Electrochemical behavior of uranium(VI) in 1-butyl-3-methylimidazolium chloride and thermal characterization of uranium oxide deposit

Pulletikurthi, Giridhar; Venkatesan, K. A.; Srinivasan, T. G.; Rao, P. R. Vasudeva

doi:10.1016/j.electacta.2006.09.038

Cited by 115 publications

(71 citation statements)

References 37 publications

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“…In addition to that the anodic peak currents vary linearly with the square root of the scan rate (Figure 7). These results lead to the conclusion that the complexes of uranium(IV) oxidized quasi-reversibly to uranium(V) species at Platinum electrode [14]. rate (Figures 8 and 9).…”

Section: Electrochemical Studiesmentioning

confidence: 82%

Synthesis, Spectral and Electrochemical Studies of Complex of Uranium(IV) with Pyridine-3-Carboxylic Acid

Nazir¹,

Naqvi²

2013

AJAC

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The investigation of complexation of uranium with biological active ligands is vital for understanding uranium speciation in biosystems. A number of studies have been undertaken for investigating the complexation of uranium in its (VI) oxidation states but similar investigations pertaining to the interaction of uranium, in lower oxidation states, with biological ligands is scarce. The aim of the work is to bridge this gap and studies have been carried out to determine the coordination pattern of pyridine-3-carboxylic acid with uranium(IV). Semi-micro analysis, spectro-analytical techniques, magnetic susceptibility and cyclic voltammetry have been employed for the characterization of the synthesized complex.

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Section: Electrochemical Studiesmentioning

confidence: 82%

Synthesis, Spectral and Electrochemical Studies of Complex of Uranium(IV) with Pyridine-3-Carboxylic Acid

Nazir¹,

Naqvi²

2013

AJAC

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“…The general characteristics of organic ionic liquids are shown in table 4.1. [42] Ionic liquids have found applicability in many areas such as: green chemistry industry for their stable and organic nature, gas handling using ionic liquids as solvents [43], nuclear industry for recovery of uranium and other metals from spent nuclear fuel and other sources [44], solar energy for use as a heat transfer and storage medium [45] and batteries [46]. More recently, magnetic ionic liquids have also been reported.…”

Section: General Propertiesmentioning

confidence: 99%

Electrospray Propulsion

Lozano¹,

Martı́nez-Sánchez²,

Hruby³

2010

Encyclopedia of Aerospace Engineering

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Micro-propulsion has been studied for many years due to its applications in small-tomedium sized spacecraft for precise satellite attitude control. Electrospray thrusters are promising thrusters built upon the state of the art in micro-technology and with flexible performance in terms of their high efficiency and high specific impulse. One challenge is to investigate in detail the mechanism for ion emission to complement experimental results and understand better how emission occurs in the micro to nano scale. Thus, atomistic modeling is used to understand properties of emitted charged particles which determine how the thrusters perform.As a preliminary study of ion emission from Taylor cones, ion evaporation from 3 -5 nm droplets was observed in molecular dynamics (MD) simulations to validate the atomistic modeling and to investigate activation energies. Ion emission was examined in terms of internal and external electric fields and the activation energies of each case were obtained using Schottky's model and direct energy calculation to compare with experimental values. Ion emission was mainly observed with electric field strengths between 1.2 -2.0 V/nm and the emitted species include both solvated and non-solvated ions. Propulsive properties from Taylor cones are examined using results from the analysis of electric current from ion emission.In addition to an observation of ion emission from liquid droplets, numerical simulations for interactions between a solid plate and liquid droplets were conducted with MD simulation. It was concluded that another selection of force field needs to be considered to pursue further details, such as electrochemical effects.

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“…ii) as a possible alternative to high temperature molten salts (e.g. LiClKCl) in nonaqueous-based pyrochemical reprocessing [9][10][11][12][13][14][15][16][17][18][19]. In this way, the substitution of unsymmetrical organic cation in place of alkali metal cation of the inorganic salts, drastically reduces the melting point of the resulting organic chloride to near ambient temperature.…”

Section: Introductionmentioning

confidence: 99%

“…In order to evaluate the applicability of ILs, as alternative media to the conventional molten salts in the pyroreprocessing process, the knowledge of the electrochemical behaviour of actinides (Ans) and fission products (FPs), mainly lanthanides (Lns), is a major concern. Nevertheless, the reported information in C 4 mimCl and C 2 mimCl is scarce, ambiguous and conflicting [13][14][15][16][17]19].…”

Section: Introductionmentioning

confidence: 99%

“…From these backgrounds, various ILs having a wide electrochemical window, adequate thermal and radiation stability, and ability to dissolve organic and inorganic compounds has been proposed, being between them the 1-butyl-3-methyl imidazolium chloride (C 4 mimCl) [11,[13][14][15][16][17]20] and the 1-ethyl-3-methyl imidazolium chloride (C 2 mimCl) [19]. In order to evaluate the applicability of ILs, as alternative media to the conventional molten salts in the pyroreprocessing process, the knowledge of the electrochemical behaviour of actinides (Ans) and fission products (FPs), mainly lanthanides (Lns), is a major concern.…”

Section: Introductionmentioning

confidence: 99%

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A comparative study of the cathodic behaviour of EuCl3 in two imidazolium chloride ionic liquids, the 1-butyl-3-methylimidazolium (C4mimCl) and the 1-ethyl-3-methylimidazolium (C2mimCl), on a glassy carbon electrode

Barrado

Rodríguez

Castrillejo

2017

Journal of Electroanalytical Chemistry

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A B S T R A C TThis work presents a comparative study of the electrochemical behaviour, on a glassy carbon electrode, of dissolved EuCl 3 in two chlorobasic ionic liquids, the 1-ethyl-3-methylimidazolium chloride, C 2 mimCl, and the 1-buthyl-3-methylimidazolium chloride, C 4 mimCl, over the temperature ranges 363-398 K and 343-363 K respectively. In both media, the electro-reduction of EuCl 6 3 − takes place via only one electrochemical step . The electrochemical system EuCl 6 4 − /Eu(0) has not been observed within the electrochemical window of both ILs, due to the prior reduction of the respective imidazolium cation from the solvents, which inhibits the electro-extraction of Eu (0) from the media on the GC electrode. The paper describes how several electrochemical techniques (e.g. cyclic voltammetry (CV), convolutive potential sweep voltammetry (CPSV), steady state voltammetry (SSV), chronopotentiometry (CP) and chronoamperometry (CA)) have been used experimentally: i) verifying assumptions used in their theoretical analysis, and ii) ensuring reproducible conditions at the electrode/electrolyte interface, with the aim to obtain highprecision measurements of the diffusion coefficient of EuCl 6 3 − . In order to know if there are discrepancies between the obtained data, a two-way analysis of variance, ANOVA, has been carried out. The analysis has shown that with a 95% confidence level there are no significant differences between the diffusion coefficients obtained by the different techniques. On the other hand, the diffusion coefficient of EuCl 6 3 − increases with the temperature following the Arrhenius law, being the activation energy for diffusion 40.4 ± 2.6 and 60.2 ± 1.8 kJ mol − 1 in C 2 mimCl and C 4 mimCl respectively. The dimensionless Schmidt numbers, defined as the ratio between solvent viscosity and solute diffusivity (Sc = ν/D), have also been calculated to characterise the solute global mass transport through its environment. On the GC electrode, the electro-reduction of EuCl 6 3 − to EuCl 6 4 − is a quasi-reversible process. Accurate values of the kinetic parameters (i.e. the intrinsic rate constant of charge transfer, k 0 , and the charge transfer coefficient, α), as well as the reversible half wave potential, E r 1/2 , have been obtained for the first time in the mentioned ionic liquids, by simulation of the cyclic voltammograms and logarithmic analysis of the voltammograms and convoluted curves.

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Electrochemical behavior of uranium(VI) in 1-butyl-3-methylimidazolium chloride and thermal characterization of uranium oxide deposit

Cited by 115 publications

References 37 publications

Synthesis, Spectral and Electrochemical Studies of Complex of Uranium(IV) with Pyridine-3-Carboxylic Acid

Synthesis, Spectral and Electrochemical Studies of Complex of Uranium(IV) with Pyridine-3-Carboxylic Acid

Electrospray Propulsion

A comparative study of the cathodic behaviour of EuCl3 in two imidazolium chloride ionic liquids, the 1-butyl-3-methylimidazolium (C4mimCl) and the 1-ethyl-3-methylimidazolium (C2mimCl), on a glassy carbon electrode

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