Electrochemical behavior of zirconium(IV) in 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide ionic liquid

Krishna, G. Murali; Suneesh, A.S.; Venkatesan, K. A.; Antony, M. P.

doi:10.1016/j.jelechem.2016.07.015

Cited by 10 publications

(5 citation statements)

References 30 publications

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“…The transients reveal a profile similar to nucleation and growth of metal on a heterogeneous surface. 70,71 However, the nucleation phenomenon is qualitatively studied under quiescent conditions, whereas electrodeposition is carried out under controlled convection and it would be erroneous to extrapolate the models derived for the former to the latter. In both the electrolyte baths, the current decayed rapidly at the beginning of each transient and could be related to the charging of the double layer on the electrode surface and the formation of the initial nuclei on the nickel substrate.…”

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confidence: 99%

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Electrochemical Behavior of Sm(III) and Electrodeposition of Samarium from 1-Butyl-1-Methylpyrrolidinium Dicyanamide Ionic Liquid

Andrew

Murugesan

Jayakumar

2022

J. Electrochem. Soc.

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Electrodeposition of rare-earth metals using ionic liquids is considered as a potential alternative to conventional high-temperature molten salt electrolysis. Herein, the electrochemical reduction of samarium(III) at near ambient conditions is investigated using different samarium precursors, namely, triflate (Sm(OTf)3), nitrate (Sm(NO3)3.6H2O) and chloride (SmCl3), in 1-butyl-1-methylpyrrolidinium dicyanamide ([BMP][DCA]) ionic liquid. FT-infrared and Raman spectroscopy analyses of Sm3+/[BMP][DCA] solutions confirm the coordination of Sm3+ species with [DCA]^- ion through nitrogen atom. Cyclic voltammetry of Sm3+ at glassy carbon electrode provides evidence of a two-step reduction process in all the systems via Sm3+ to Sm2+ and Sm2+ to Sm0 with peaks observed at similar reduction potentials owing to indifference in samarium(III) chemistries in each medium which is supported by a plausible mechanism. The diffusion coefficient of Sm3+ in [BMP][DCA] was determined to be 3.00x10-7, 3.64 x 10-8 and 1.90x10-7 cm2.s-1 for Sm(OTf)3, Sm(NO3)3.6H2O and SmCl3 systems, respectively. The electrodeposition of samarium was achieved on nickel and glassy carbon substrates under two different potentials and temperatures. X-ray photoelectron spectroscopy confirms that the samarium electrodeposits are a mixture of metallic and oxide forms.

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confidence: 99%

“…S9c). Therefore, the electrodeposition of samarium in the [BMP][DCA] could follow a pathway similar to three-dimensional nucleation and growth 63,70,71 but under convection.…”

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confidence: 99%

Electrochemical Behavior of Sm(III) and Electrodeposition of Samarium from 1-Butyl-1-Methylpyrrolidinium Dicyanamide Ionic Liquid

Andrew

Murugesan

Jayakumar

2022

J. Electrochem. Soc.

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“…It was reported that the reduction of Zr(IV) involves a two-step reduction reaction in which Zr(IV) was reduced to Zr(II) which was then followed by the reduction of Zr(II) to Zr. 22 Considering the direct reduction of Zr(IV) to Zr observed in the present ionic liquid, as compared to the two-step reduction observed in C 4 mimNTf 2 , 24,26 the study shows that, depending upon the nature of cation associated with the ionic liquid, the reduction behavior of Zr can be different.…”

Section: Resultsmentioning

confidence: 66%

“…A similar behavior was also reported for the reduction of Zr(IV) in other ionic liquids. 24 Previously, we also studied 26 the electrochemical behavior of Zr(IV) in 1-butyl-3-methyl imidazolium bis(trifluoromethylsulfonyl)imide (C 4 mimNTf 2 ) ionic liquid. It was reported that the reduction of Zr(IV) involves a two-step reduction reaction in which Zr(IV) was reduced to Zr(II) which was then followed by the reduction of Zr(II) to Zr.…”

Section: Resultsmentioning

confidence: 99%

“…Similarly, the electrochemical behavior of Zr(IV) in 1-butyl-3-methylimdazolium bis(trifluoromethanesulfonyl)imide was studied and it was reported that Zr(IV) in C 4 mimNTf 2 underwent a two-step, two-electron transfer reaction at the working electrode. 26 However, there are no studies reported in the literature on the electrochemical behavior of U(IV) and Zr(IV) together in ionic liquid medium.…”

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Anodic Dissolution of Uranium and Zirconium Metals and Electrochemical Behavior of U(Iv) and Zr(Iv) in Ionic Liquid Medium for Metallic Fuel Reprocessing

Krishna

Suneesh

Venkatesan

et al. 2018

J. Electrochem. Soc.

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The metallic fuel in a nuclear reactor is composed of an alloy of uranium and zirconium (5-10 wt%). To understand the feasibility of using room-temperature ionic liquids for reprocessing of spent metallic fuels, the electrochemical behavior of U(IV) and Zr(IV) was studied in the room-temperature ionic liquid, N-butyl-N-methylpyrrolidinium bis(trifuoromethylsulfonyl)imide (C 4 MPyNTf 2 ). The U(IV) and Zr(IV) ions were introduced into the ionic liquid medium by anodic oxidation of metallic uranium or zirconium as working electrode in the presence of bis(trifuoromethylsulfonyl)imide acid (HNTf 2 ). The U(IV) present in C 4 MPyNTf 2 , in the presence and absence of C 4 MPyCl, was characterized by visible absorption spectroscopy. The voltammetric behavior of U(IV) and Zr(IV) in ionic liquid medium was studied by cyclic voltammetry and chronoamperometry. The U(IV) in ionic liquid was found to undergo a two-step reduction to metallic form at −3.2 V, and Zr(IV) underwent a single-step reduction to metallic form at −1.5 V. The study showed the possibility of using C 4 MPyNTf 2 ionic liquid for electrorefining of metallic fuels.

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Electrodeposition of rare refractory metals in low-temperature ionic liquids

Wang,

Jiao,

Yuan

et al. 2024

Rare Met.

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Electrochemical behavior of zirconium(IV) in 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide ionic liquid

Cited by 10 publications

References 30 publications

Electrochemical Behavior of Sm(III) and Electrodeposition of Samarium from 1-Butyl-1-Methylpyrrolidinium Dicyanamide Ionic Liquid

Electrochemical Behavior of Sm(III) and Electrodeposition of Samarium from 1-Butyl-1-Methylpyrrolidinium Dicyanamide Ionic Liquid

Anodic Dissolution of Uranium and Zirconium Metals and Electrochemical Behavior of U(Iv) and Zr(Iv) in Ionic Liquid Medium for Metallic Fuel Reprocessing

Electrodeposition of rare refractory metals in low-temperature ionic liquids

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