Preparation of Er-Fe Alloy Films in Dimethylsulfoxide by Electrodeposition Method

摘要

Cyclic voltammetry and chronoamperometry were used to investigate the eleclrochemical behavior of Fe ( Ⅱ ) and Er( Ⅲ ) in a LiClO_4-DMSO(dimethylsufoxide) system at Pt and Cu electrodes. Experimental results indicate that the reductions of Fe ( Ⅱ ) to Fe(0) and Er ( Ⅲ ) to Er(0) were irreversible at Pt and Cu electrodes. The diffusion coefficient and the electron transfer coefficient of Fe ( Ⅱ ) in a 0.01 mol/L FeCl_2-0. 1 mol/L LiClO_4-DMSO system at 303 K were 1. 70 X 10~(-10) m~2/s and 0. 08 respectively, the diffusion coefficient and the electron transfer coefficient of Er( Ⅲ ) in a 0. 01 mol/L ErCl_3-0. 1mol/L LiClO_4-DMSO system at 303 K were 1. 47 X 10~(-10) m~2/s and 0. 108 respectively. The homogeneous, strong adhesive Er-Fe alloy films containing Er of 31. 39% ―42. 12% in mass fraction with metallic lustre were prepar d by potentiostalic electrolysis on a Cu electrode in a ErCl_3-FeCl_2-LiClO_4-DMSO system at ―1. 75――2. 50 V(vs. SCE).