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Citation: Wang Jian-Chao, He Feng-Rong, Liu Guan-Kun, Tong Ye-Xiang. Electrochemical Preparation of Y-Mg-Co Alloy Film from Dimethylformamide Bath[J]. Acta Physico-Chimica Sinica, ;2002, 18(08): 732-736. doi: 10.3866/PKU.WHXB20020812 shu

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

1.
School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou　510275;Chemisitry Department, Qinghai Normal University, Xi’ning　810008

Received Date: 10 December 2001
Available Online: 15 August 2002

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.
- Yttrium;Potentiostatic electro-deposition;Y-Mg-Co alloy;Diffusion coefficient;Transfer coefficient
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