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Water-Facilitated Electrodeposition of Neodymium in a Phosphonium-Based Ionic Liquid

Water-Facilitated Electrodeposition of Neodymium in a Phosphonium-Based Ionic Liquid

Laura Sanchez-Cupido, Jennifer M Pringle, Amal L Siriwardana, Ainhoa Unzurrunzaga, Matthias Hilder, Maria Forsyth, Cristina Pozo-Gonzalo

J Phys Chem Lett. 2019 Jan 17;10(2):289-294.

PMID: 30620201

Abstract:

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP460092039	Trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl)amide		460092-03-9	Price

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