Electrochemical Fabrication of Copper and Tin Micro-Crystals from a Protic Ionic Liquid Medium

New protic ionic liquid, namely 1-Methylpiperidinium trifluoromethane sulphonate [HmPip][OTf] was synthesized and employed for the dissolution of Cu and Sn metal precursors followed by the electrodeposition process of the subsequent metals. The cyclic voltammogram of [HmPip][OTf], CuCl2 (80 mM) in [HmPip][OTf] and SnCl2 (65 mM) in [HmPip][OTf] phase recorded at glassy carbon electrode (working electrode), with the glassy carbon as counter and platinum as the reference electrode. The CV indicates that Cu2+ underwent two-step one-electron transfer, whereas Sn2+ reduced via one step two-electron transfer. The diffusion coefficient of Cu1+, Cu2+ and Sn2+ ions in [HmPip][OTf] phase were evaluated by the CV method. The experimental temperature and the scan rate were set at 353 K and 110 mV/s respectively. Electrodeposition of Cu and Sn was done at their corresponding reduction potential determined from cyclic voltammetry. Spectroscopic investigation of the deposits obtained after electrodeposition is done by SEM-EDX as well as XRD.