Nucleation and early stages of growth of lead onto copper electrodes from dilute electrolytes  

稀溶液中铅在铜电极上的成核和早期生长（英文）

作　　者：Nebojsa D.NIKOLIC SanjaI.STEVANOVIC Goran BRANKOVIC 

机构地区：[1]ICTM-Department of Electrochemistry,University of Belgrade,Njegoseva 12,Belgrade,Serbia [2]Institute for Multidisciplinary Research,University of Belgrade,Kneza Viseslava1a,Belgrade,Serbia

出　　处：《Transactions of Nonferrous Metals Society of China》2016年第12期3274-3282,共9页中国有色金属学报（英文版）

基　　金：supported by the Ministry of Education,Science and Technological Development of the Republic of Serbia under the research project:“Electrochemical synthesis and characterization of nanostructured functional materials for application in new technologies”(Project No.172046)

摘　　要：The processes of nucleation and growth of lead from the dilute electrolytes on copper substrates were investigated bychronoamperometry and by scanning electron microscopic (SEM) analysis of the deposits obtained in the potentiostatic regime ofelectrolysis. In the dependence of electrodeposition conditions, the nucleation of Pb followed either progressive or instantaneoustype. The type of nucleation changed from progressive to instantaneous one with increasing the concentration of Pb(II) ions and theoverpotential of electrodeposition. Regardless of the type nucleation, a novel type of Pb particles like cobweb was formed by thepotentiostatic electrodeposition in the moment of nucleation and at the early stages of growth. On the basis of the shape ofcobweb-like particles and the electrodeposition conditions leading to their formation, these particles were situated in the group ofspongy-like ones. Also, comparative morphological analysis of Pb deposits obtained in the conditions of progressive andinstantaneous nucleation confirmed the existence of two limiting types of nucleation.采用计时电流方法和对恒电位电解得到的沉积产物进行SEM观察,研究稀溶液中铅在铜电极上的成核和生长过程。根据电沉积条件不同,铅的成核分为连续成核和瞬时成核两种形式。随着溶液中Pb(II)浓度和电沉积时超电势的增加,成核形式从连续成核转变为瞬时成核。无论是哪种成核形式,在恒电位电解的成核和早期生长阶段,生成的铅颗粒都是蛛网状的。根据蛛网状颗粒的形状和导致它们生成的电沉积条件,这些颗粒属于海绵状颗粒。对连续成核和瞬时成核条件下的铅沉积产物的形貌观察表明,存在两种成核极限。

关 键 词：ELECTRODEPOSITION LEAD NUCLEATION GROWTH morphology CHRONOAMPEROMETRY 

分 类 号：TQ153.2[化学工程—电化学工业]