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 (NTf${}_2^{-}$) 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. 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.

在此通讯中，报道了一种新型的具有阳离子稀土元素（REE）的任务特定的离子液体（IL）。这些新型IL具有约6 V的宽电化学窗口，可在室温下直接电沉积REE金属。通过溶解双（三氟甲烷）磺酰亚胺（NTf${}_{\mathrm{2个}}^{-}$）磷酸三甲酯（TMP）中性配体中的稀土盐（Ln（NTf ₂）₃）（Ln：Lanthanide）。具体而言，在基于TMP的IL系统中研究了四个REE（Nd，Dy，Gd和Pr）。所有四种金属均在室温下成功沉积。这证明了IL系统可用于多种REE的电沉积，这为寻求替代高温熔融盐系统进行稀土沉积的研究开辟了一条新的研究途径。