Acta Phys. -Chim. Sin. ›› 2002, Vol. 18 ›› Issue (08): 732-736.doi: 10.3866/PKU.WHXB20020812

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Electrochemical Preparation of Y-Mg-Co Alloy Film from Dimethylformamide Bath

Wang Jian-Chao;He Feng-Rong;Liu Guan-Kun;Tong Ye-Xiang   

  1. School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275;Chemisitry Department, Qinghai Normal University, Xi’ning 810008
  • Received:2001-12-10 Revised:2002-02-04 Published:2002-08-15
  • Contact: Liu Guan-Kun E-mail:ceslgk@zsu.edu.cn

Abstract: The cyclic voltemmetry method was used to investigate the electrochemical behaviors of Y(Ⅲ),Mg(Ⅱ)and Co(Ⅱ) in Y(NO3)3-LiClO4-DMF,Mg(ClO4)2-LiClO4-DMF and CoCl2-LiClO4-DMF systems on Pt cathode. Experimental results indicate that the electro-reduction of Y(Ⅲ),Mg(Ⅱ)and Co(Ⅱ) to Y、Mg and Co is an one-step irreversible in process. The diffusion coefficient and transfer coefficient of Y(Ⅲ)in Y(NO3)3-LiClO4-DMF system at 301 K are 1.68×10-5 cm2•s-1,0.10; Mg(Ⅱ)in Mg(ClO4)2-LiClO4-DMF system at 301 K are 2.95×10-6 cm2•s-1,0.11; Co(Ⅱ) in CoCl2-LiClO4-DMF system at 301 K are 1.34×10-5 cm2•s-1 and 0.24 respectively. Y-Mg-Co alloy films containing Y from 3.88% to 58.66% and Mg from 4.51% to 17.52% were prepared by potentiostatic electrodeposition on Cu substrate with deposition potential ranging from -1.50 V to -3.00 V(vs SCE).Their surface morphologies were smooth, adhesive, uniform and have metallic luster.

Key words: Yttrium, Potentiostatic electro-deposition, Y-Mg-Co alloy, Diffusion coefficient, Transfer coefficient