摘要
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 ekist mainly as[Nicit(NH3)3]- in ammoniacal citrate solution.
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 ekist mainly as[Nicit(NH3)3]- in ammoniacal citrate solution.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1995年第4期351-355,共5页
Acta Physico-Chimica Sinica
关键词
电沉积
机理
柠檬酸
镍
钼
合金
Electrodeposition, Ni-Mo alloy, Mechanism
