锌氨络离子阴极还原机理的研究  

Investigation of Cathodic Reduction Mechanismof Zinc-Ammonium Complex Ion

作　　者：马春[1] 余仲兴[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《上海有色金属》2002年第3期103-106,共4页Shanghai Nonferrous Metals

摘　　要：在ZnCl2 NH4Cl H2 O溶液体系中 ,用线性电位扫描法研究了锌氨络离子的阴极过程。在锌氨络合物浓度恒定的条件下 ,通过实验获得了平衡电位和交换电流密度与游离铵根离子浓度间的关系 ,据此确定了在高氯化铵浓度的条件下 ,溶液中主要形成四配位络合离子 [Zn(NH3 ) 4 ]2 + ,而直接在阴极上放电的络离子则为 [Zn (NH3 ) 2 ]2 + 。In the system of ZnCl 2 NH 4Cl H 2O ,the cathodic process of zinc ammonium complex ion is studied by means of linear potential sweep method.When the concentration of the ion is stable,the relation of the balance potential and exchanging current density with the concentration of the free ammonium radical is experimentally defined.According to this relation,it is found that at a high concentration of ammonium chloride,mainly formed in the solution are the radical of [Zn ( NH 3) 4 2+ ] while discharged at the cathode are the complex ions of [Zn(NH 3) 2] 2+ .

关 键 词：锌氨络离子 炼锌 阴极过程 电积 

分 类 号：TF813[冶金工程—有色金属冶金]