物理化学学报 >> 1995, Vol. 11 >> Issue (04): 351-355.doi: 10.3866/PKU.WHXB19950413

研究简报 上一篇    下一篇

从氨性柠檬酸溶液中电沉积Ni-Mo的机理研究

曾跃,姚素薇,郭鹤桐   

  1. 湖南师范大学化学系|长沙 410006|天津大学应用化学系|天津 300072
  • 收稿日期:1994-01-22 修回日期:1994-04-12 发布日期:1995-04-15
  • 通讯作者: 曾跃

Electrodeposition Mechanism of Ni-Mo Alloys from Ammoniacal Citrate Solution

Zeng Yue,Yao Su-Wei,Guo He-Tong   

  1. Department of Chemistry,Hunan Normal Univeristy,Changsha 410006|Department of Applied Chemistry,Tianjin University,Tianjin 300072
  • Received:1994-01-22 Revised:1994-04-12 Published:1995-04-15
  • Contact: Zeng Yue

关键词: 电沉积, Ni-Mo合金, 机理

Abstract:

The electrodeposition mechanism of Ni-Mo alloys from ammoniacal citrate solution was investigated by means of steady-state polarization curves, impedance measurement and XPS analysis. XPS analysis showed the existence of tetravalent molybdenum corresponding to MoO2 on the surface of some deposits. Probably, as an intermediate product, MoO2 was reduced by atomic hydrogen adsorpted on nickel. Electrochemical investigation indicated that [Nicit(NH3)2]-ion is the electro-active species of nickel, though nickel ion exist mainly as [Nicit(NH3)2]- in ammoniacal citrate solution.

Key words: Electrodeposition, Ni-Mo alloy, Mechanism