Water-Facilitated Electrodeposition of Neodymium in a Phosphonium-Based Ionic Liquid
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2019-01-17
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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 [P 6,6,6,14 ][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 Nd 3+ in [P 6,6,6,14 ][TFSI] has been studied. The presence of metallic neodymium in the deposits has been confirmed by X-ray photoelectron spectroscopy.
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Publisher Copyright: © 2019 American Chemical Society.
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Metal recovery , Amides , Deposits , Electrochemistry , X ray photoelectron spectroscopy , Rare earths , Metal recovery , Amides , Deposits , Electrochemistry , X ray photoelectron spectroscopy , Rare earths , General Materials Science , Physical and Theoretical Chemistry , SDG 7 - Affordable and Clean Energy , Funding Info , ELKARTEK 2016, KK-2016/00095, LISOL , ELKARTEK 2016, KK-2016/00095, LISOL
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Sanchez-Cupido , L , Pringle , J M , Siriwardana , A L , Unzurrunzaga , A , Hilder , M , Forsyth , M & Pozo-Gonzalo , C 2019 , ' Water-Facilitated Electrodeposition of Neodymium in a Phosphonium-Based Ionic Liquid ' , Journal of Physical Chemistry Letters , vol. 10 , no. 2 , pp. 289-294 . https://doi.org/10.1021/acs.jpclett.8b03203