摘要
用线性极化曲线、循环伏安法和计时电流法等考察了添加剂苄叉丙酮对锌—氨—氯化铵体系锌电沉积过程、电锌形貌和结构的影响。结果表明,苄叉丙酮抑制锌离子的还原过程,当其浓度为0.08g/L时,锌的析出电位较未加入添加剂时负向移动了132mV,交换电流密度由3.47×10-4 A/m2变为0.51×10-4 A/m2。苄叉丙酮没有改变锌电沉积的形核方式,仍为3D瞬时成核,但减小了晶体的生长速率。锌的形貌主要以层状为主,苄叉丙酮不仅使锌晶面生长具有择优取向,同时还能细化晶粒。
The effects of benzylideneacetone on zinc deposition from Zn （Ⅱ）-NH3-NH4 Cl-H20 system on glassy carbon electrode, morphology and structure of deposited zinc were investigated by linear sweep voltammetry, cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. The results show that benzylideneacetone partially inhibits reduction of zinc ion, zinc deposition potential negatively shifts by 132 mV and exchange current density changes from 3.47× 10^-4 A/m2 to 0.51× 10^-4 A/m2 with benzylideneacetone concentration of 0.08 g/L. Benzylideneacetone does not change zinc nucleation mechanisms of 3D-instantaneous nucleation during initial stages of zinc deposition, but decreases its growth rate. Zinc morphologies are mainly in form of layer. Growth of zinc crystal plane has preferred orientation, and grain size is refined in presence of benzylideneacetone.
出处
《有色金属（冶炼部分）》
CAS
北大核心
2015年第11期1-6,共6页
Nonferrous Metals（Extractive Metallurgy)
基金
国家重点基础研究发展计划项目(2014CB643404)
关键词
锌
氨—氯化铵溶液
苄叉丙酮
电沉积
zinc
NH3-NH4 Cl solution
benzylideneacetone
electrodeposition
