物理化学学报 >> 2004, Vol. 20 >> Issue (05): 463-467.doi: 10.3866/PKU.WHXB20040504

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添加剂作用下钯电沉积行为研究

杨防祖;黄令;许书楷;周绍民   

  1. 厦门大学化学系,固体表面物理化学国家重点实验室,物理化学研究所,厦门　361005
  • 收稿日期:2003-10-06 修回日期:2003-12-09 发布日期:2004-05-15
  • 通讯作者: 杨防祖 E-mail:smzhou@xmu.edu.cn

Studies on the Electrodeposition Behaviors of Palladium by the Actions of Additive

Yang Fang-Zu;Huang Ling;Xu Shu-Kai;Zhou Shao-Min   

  1. Chemistry Department, State Key Laboratory for Physical Chemistry of Solid Surfaces, Institute of Physical Chemistry, Xiamen University, Xiamen　361005
  • Received:2003-10-06 Revised:2003-12-09 Published:2004-05-15
  • Contact: Yang Fang-Zu E-mail:smzhou@xmu.edu.cn

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摘要： 在含有4 g•L－1 Pd(NH3)2Cl2和104 g•L－1 NH4H2PO4的闪镀钯基础电解液中,采用极化曲线、循环伏安法和计时安培法研究添加剂作用下钯在玻璃碳电极上的电沉积和电结晶行为.结果表明,添加剂阻化钯的电沉积;钯在玻碳电极上的交换电流密度很低;钯电沉积过程经历了晶核形成过程,其电结晶机理在不含添加剂时接近于三维连续成核,含添加剂时接近于三维瞬时成核.

关键词: 钯, 电沉积, 电结晶, 添加剂, 动力学

Abstract: The basic electrolyte solution of flash palladium plating contains of 4 g•L－1 Pd(NH3)2Cl2 and 104 g•L－1 NH4H2PO4. In the solution with or without additive the electrodeposition and electrocrystallization behaviors of palladium on glassy carbon(GC)electrode were studied by means of polarization curve, cyclic voltammetry and potentiostatic current transient. The results showed that the additive hindered the electrodeposition of palladium. The exchange current density of palladium on GC electrode was very low. The electrodeposition of palladium proceeded a nucleation. Its electrocrystallization mechanism in the electrolyte solution without additive was in tendency to nucleate progressively in three dimensions while in the electrolyte solution containing additive it was in tendency to nucleate instantaneously in three dimensions.

Key words: Palladium, Electrodeposition, Electrocrystallization, Additive, Kinetics