摘要
采用线性扫描伏安技术、交流阻抗技术和计时电流法研究锗在锌电沉积过程中的电化学行为,结合Zn-H2O系和Ge-H2O系E—pH图从热力学角度进行分析。结果表明:锗会削弱锌电沉积阴极极化,且随着电解液中锗浓度的增加,去极化作用增强,而且锗会引起电荷传递电阻的降低,改变锌电沉积电荷传递步骤,加剧氢还原反应的发生。
The electrochemical behavior of germanium in zinc deposition from acidic electrolytes was investigated by using electrochemical techniques such as linear cyclic voltammetry technology, electrochemical impedance spectroscopy and chronoamperometry, and E—pH equilibrium diagram of Zn-H2O system and Ge-H2O system was analyzed based on the thermodynamics.The results show that germanium can decrease cathodic polarization of zinc deposition, and the depolarization heightens with increasing germanium concentration in acidic electrolytes.And it is important that germanium can reduce charge transfer resistance, change charge transfer step of zinc deposition, and stimulate hydrogen evolution reaction.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2009年第9期1690-1694,共5页
The Chinese Journal of Nonferrous Metals
基金
昆明理工大学校人才基金资助项目(KKZ3200932015)
昆明理工大学分析测试研究中心主任基金资助项目(200804)
关键词
锗
锌电沉积
电化学行为
E—pH图
germanium
zinc deposition
electrochemistry behavior
E—pH equilibrium diagram
