物理化学学报 >> 1989, Vol. 5 >> Issue (06): 693-698.doi: 10.3866/PKU.WHXB19890610

研究论文 上一篇    下一篇

镍铁异常共沉积研究

李平; 许家园; 周绍民   

  1. 厦门大学化学系
  • 收稿日期:1988-01-25 修回日期:1989-03-15 发布日期:1989-12-15
  • 通讯作者:

STUDIES ON Ni-Fe ALLOY CODEPOSITION

Li Ping; Xu Jiayuan; Zhou Shaomin   

  1. Chemistry Department; Xiamen University
  • Received:1988-01-25 Revised:1989-03-15 Published:1989-12-15
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摘要： 本文应用环盘电极并根据环电极上Fe~(2+)离子氧化的极限电量及盘电板上Fe~(2+)离子阴极还原对上述环电极过程的屏蔽效应分别建立两种分解Ni-Fe共沉积极化曲线的方法。应用上述方法研究Hg, Ni, Fe和Ni-Fe等电极上Ni和Fe共沉积的动力学规律。结果表明, Ni~(2+)和Fe~(2+)同时在Hg上电沉积遵循它们单独电沉积的动力学规律, 而在Fe电极上Ni~(2+)电沉积被活化, 在Ni电极上Fe~(2+)电沉积却被阻化。此外, 还讨论Ni-Fe异常共沉积的机理。

Abstract: Two methods to analyze polarization curves of Ni-Fe alloy codeposition were established by using ring-disk electrode based upon the limiting electricity quantity of electrooxidation of Fe~(2+) ions on ring electrode and the shielding effect on the above ring electrode process by electrorcduetion of Fe~(2+) ions on disk electrode respectively. The kinetics of Ni-Fe codeposition on Hg, Ni, Fe and Ni-Fe alloy electrodes had been investigated. The results showed that Ni~(2+) and Fe~(2+) were electrodeposited on Hg electrode with the same kinetics as they were electrodeposited individually, but Ni~(2+) was electrodeposited activably on Fe electrode, and the electrodeposition of Fe~(2+) on Ni electrode was inhibited. The mechanism of codeposition of Ni—Fe alloy had been discussed.