物理化学学报 >> 2006, Vol. 22 >> Issue (04): 502-506.doi: 10.3866/PKU.WHXB20060422

研究简报 上一篇    下一篇

SDS对镍在HNO3/Cl-/H2O体系中电化学振荡行为的影响

倪文彬;刘天晴;郭荣   

  1. 扬州大学化学化工学院, 江苏 扬州 225002
  • 收稿日期:2005-09-09 修回日期:2005-12-01 发布日期:2006-04-10
  • 通讯作者: 刘天晴 E-mail:tqliu@yzu.edu.cn

Effect of SDS on the Electrochemical Oscillation of Nickel in HNO3/Cl-/H2O Solution

NI Wen-Bin;LIU Tian-Qing;GUO Rong   

  1. School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, P. R. China
  • Received:2005-09-09 Revised:2005-12-01 Published:2006-04-10
  • Contact: LIU, Tian-Qing E-mail:tqliu@yzu.edu.cn

摘要: 阴离子表面活性剂十二烷基硫酸钠(SDS)能够控制金属镍在0.5 mol•L-1 HNO3/0.005 mol•L-1 Cl-/H2O溶液中的电流振荡行为. 在电流振荡过程中, 镍电极微分电容和电导等均出现明显的振荡特性. 随着SDS浓度的增大, 镍表面微分电容和溶液电导振幅等值均逐渐减小. 并且对SDS在镍电流振荡和钝化过程中的作用原理给予解释.

关键词: 电化学振荡, 阻抗, 镍, HNO3, SDS

Abstract: The anionic surfactant SDS can control the current oscillation of nickel in 0.5 mol•L-1 HNO3/0.005 mol•L-1 Cl-/H2O system. During the current oscillation, differential capacitance and conductance oscillations are found at the nickel electrode. With the increase of SDS concentration, the amplitudes of the differential capacitance and conductance oscillations all decrease gradually. The functionary mechanism of SDS in the current oscillations and passivation processes is explained.

Key words: Electrochemical oscillation, Impedance, Nickel, HNO3, SDS