Electrodeposition of Pt and Gd from the Same Ionic Liquid

Abstract

Platinum rare earth alloys show several times higher electrocatalytic activity for the oxygen reduction reaction than pure platinum while still maintaining an excellent stability. However, the high reactivity of rare earth elements makes the preparation of such alloys with scalable methods challenging. The electrodeposition from ionic liquids seems to be a possible route. In this work, we demonstrate the electrodeposition of the rare earth metal gadolinium from the ionic liquid butylmethylimidazolium dicyanamide at elevated temperatures. The deposition of Pt metal from this ionic liquid has been studied using several different precursors.

Environmental Technologies to Treat Rare Earth Element Pollution: Principles and Engineering

“…In the case of non-perovskite structures, RE elements can form alloys, disperse as ions or build heterogeneous structures between catalytic active particles and the RE-based compound (Gao et al, 2019). According to the literature, it is possible to deposit RE metals from RE 3+ ions in ionic liquids, however, it is often not a single step process (Asen et al, 2018). Pt-RE alloy catalyst prepared by physical metallurgical approaches can exist in the form of Pt 5 M (hexagonal CaCu 5 or the orthorhombic AuBe 5 crystal structure), Pt 3 M (Cu 3 Au) and Pt 1 M .…”