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Water-facilitated electrodeposition of neodymium in a phosphonium-based ionic liquid

journal contribution
posted on 01.01.2019, 00:00 authored by Laura Sanchez-Cupido, Jenny PringleJenny Pringle, Amal L Siriwardana, Ainhoa Unzurrunzaga, Matthias HilderMatthias Hilder, Maria ForsythMaria Forsyth, Cristina Pozo-GonzaloCristina Pozo-Gonzalo
Rare-earth metals are considered critical metals due to their extensive use in energy-related applications such as wind turbines and nickel-metal hybrid batteries found in hybrid electrical vehicles. A key drawback of the current processing methods includes the generation of large amounts of toxic and radioactive waste. Thus the efficient recovery of these valuable metals as well as cleaner processing methods are becoming increasingly important. Here we report on a clean electrochemical route for neodymium (Nd) recovery from [P6,6,6,14][TFSI], trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl)amide which is amplified three times by the presence of water, as evidenced by the cathodic current density and thicker deposits. The role of Nd salt concentrations and water content as an additive in the electrochemistry of Nd3+ in [P6,6,6,14][TFSI] has been studied. The presence of metallic neodymium in the deposits has been confirmed by X-ray photoelectron spectroscopy.

History

Journal

Journal of physical chemistry letters

Volume

10

Issue

2

Pagination

289 - 294

Publisher

American Chemical Society

Location

Washington, D.C.

eISSN

1948-7185

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2019, American Chemical Society