Study on Electrodeposition of Ho-Co Alloy in Dimethylsulfoxide
来源期刊：JOURNAL OF RARE EARTHS2002年第2期
论文作者：童叶翔 刘冠昆 王宇
Key words：rare earths; induced codeposition; potentiostatic deposition; DMSO; Ho-Co alloy;
Abstract: Co-deposition of Ho with Co was studied in dimethylsulfoxide (DMSO) by cyclic voltammetry and potentiostatic deposition at room temperature. The cyclic voltammogram shows that the codeposition of Ho with Co can be attributed to induced codeposition mechanism, for the codeposition potential is more negative than the deposition potential of Co but positive than that of Ho. For the potentiostatic deposition used in Ho-Co alloys preparation, the results indicate that in the range of selected concentration the potential is the main factor determining the content of Ho in Ho-Co alloys, while the composition of Ho3+ and Co2+ in electrolyte solution has less influence. According to the analysis of X-ray diffraction, EDAX, and scanning electron microscopy, uniform, compact and amorphous films on Cu can be obtained at -1.8 V (vs.SCE) in 0.165 molL-1 Ho(NO3) -0.135 mol*L-1 CoCl2-DMSO solution.
童叶翔1，刘冠昆1，王宇1
(1.School of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou 510275, China)
Abstract:Co-deposition of Ho with Co was studied in dimethylsulfoxide (DMSO) by cyclic voltammetry and potentiostatic deposition at room temperature. The cyclic voltammogram shows that the codeposition of Ho with Co can be attributed to induced codeposition mechanism, for the codeposition potential is more negative than the deposition potential of Co but positive than that of Ho. For the potentiostatic deposition used in Ho-Co alloys preparation, the results indicate that in the range of selected concentration the potential is the main factor determining the content of Ho in Ho-Co alloys, while the composition of Ho3+ and Co2+ in electrolyte solution has less influence. According to the analysis of X-ray diffraction, EDAX, and scanning electron microscopy, uniform, compact and amorphous films on Cu can be obtained at -1.8 V (vs.SCE) in 0.165 molL-1 Ho(NO3) -0.135 mol*L-1 CoCl2-DMSO solution.
Key words:rare earths; induced codeposition; potentiostatic deposition; DMSO; Ho-Co alloy;
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