Electrodeposition of Ni, Fe and Ni-Fe Alloys in Two Ionic Liquids: (tri (n-butyl) [2-methoxy-2-oxoethyl] Ammonium bis (trifluoromethylsulfonyl) [BuGBOEt] [Tf₂N] and (1-butyl-1- methylpyrrolidinium bis trifluoromethylsulfonyl) imide ([P_1,4] [Tf₂N])

摘要

Ni, Fe and Ni-Fe alloys electrodeposition were tested in two ionic liquids. The first one is acommercial (1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([P1,4][Tf2N])) and thesecond is a homemade (tri(n-butyl)[2-ethoxy-2oxoethyl]ammonium bis(trifluoromethylsulfonyl)imide([BuGBOEt][Tf2N])). Covering iron deposits was obtained in the[BuGBOEt][Tf2N]. Nickel deposition was only possible in the [P1,4][Tf2N]. Ni-Fe alloys were obtainedfrom the [P1,4][Tf2N] solvent. The study of the evolution of alloys composition versus polarisationshows irregular evolution depending on the applied potential. The alloys composition variesapproximately between Ni70-Fe30 and Ni90-Fe10 for applied potentials including to - 1.8 V and - 4 Vversus Ni electrode. The chemical composition, the surface morphology and the structure, of depositswere characterized by scanning electron microscopy (SEM), energy dispersive analysis (EDX) and X- ray diffraction (XRD).