Trimethyl phosphate based neutral ligand room temperature ionic liquids for electrodeposition of rare earth elements

Bagri, Prashant; Luo, Huimin; Popovs, Ilja; Thapaliya, Bishnu Prasad; Dehaudt, Jeremy; Dai, Sheng

doi:10.1016/j.elecom.2018.10.001

Title: Trimethyl phosphate based neutral ligand room temperature ionic liquids for electrodeposition of rare earth elements

Journal Article · Thu Oct 04 00:00:00 EDT 2018 · Electrochemistry Communications

DOI:https://doi.org/10.1016/j.elecom.2018.10.001· OSTI ID:1480617

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Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of Tennessee, Knoxville, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy

In this communication, a new class of task-specific ionic liquids (ILs) with cationic rare earth elements (REEs) is reported. These novel ILs have a wide electrochemical window of about 6 V, enabling direct electrodeposition of REE metals at room temperature. The ILs were prepared by dissolving bis(trifluoromethane)sulfonimide (NTf₂^–) based rare earth salts (Ln(NTf₂)₃) (Ln:Lanthanide) in trimethyl phosphate (TMP) neutral ligand. Specifically, four REEs (Nd, Dy, Gd, and Pr) have been investigated in TMP based IL systems. All four metals were successfully deposited at room temperature. In conclusion, this demonstrates the applicability of the IL systems for electrodeposition of a wide range of REEs, which opens a new avenue of research for the quest to supplant high temperature molten salt systems for rare earth deposition.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1480617

Journal Information:: Electrochemistry Communications, Vol. 96, Issue C; ISSN 1388-2481

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 18 works

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Cited By (2)

Communication—Direct Room-Temperature Electrodeposition of La from LaCl ₃ in an Organic Solvent Supported by LiNO ₃ Zhang, Baoguo; Yao, Yu; Shi, Zhongning Journal of The Electrochemical Society, Vol. 166, Issue 6 https://doi.org/10.1149/2.1161906jes	journal	January 2019
Low-temperature electrochemical codeposition of aluminum-neodymium alloy in a highly stable solvate ionic liquid Zhang, Baoguo; Shi, Zhongning; Shen, Lingling Journal of Solid State Electrochemistry, Vol. 23, Issue 6 https://doi.org/10.1007/s10008-019-04293-7	journal	May 2019

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Figure 1(p. 7)

Figure 2(p. 8)

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Electrodeposition
Ionic liquids
Rare earth elements
Room temperature
Neutral ligand