Nucleation/growth mechanism of electrocrystallization for As-Sb alloy in hydrochloric acid system  

盐酸体系中As-Sb合金的电结晶形核/生长机理（英文）

作　　者：Hua-zhen CAO Yu-feng ZHANG Qian-qian WANG Lian-kui WU Guo-qu ZHENG 曹华珍;张煜峰;王倩倩;伍廉奎;郑国渠(浙江工业大学材料科学与工程学院,杭州310014)

机构地区：[1]College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China

出　　处：《Transactions of Nonferrous Metals Society of China》2017年第10期2291-2299,共9页中国有色金属学报（英文版）

基　　金：Project(51374185)supported by the National Natural Science Foundation of China

摘　　要：The initial electrocrystallization of As-Sb alloy on glass carbon(GC)electrode in hydrochloric acid system was studiedvia cyclic voltammetry(CV)and chronoamperometry measurements.Current transients were presented in dimensionless formation,which showed that the initial nucleation/growth process of As-Sb alloy followed three-dimensional nucleation model with diffusioncontrolledgrowth.Relevant nucleation parameters were calculated by analyzing related current transients.Particular attention waspaid to the effect of Sb(III)concentration on the nucleation process during the co-electrodeposition.The quantitative results showedthat Sb(III)played a positive effect on enhancing the nucleation rate of As-Sb alloy,leading to the evolution of alloy surfacemorphology from grain structure to compact layer structure.通过循环伏安(CV)测试和电流暂态曲线研究玻碳电极(GC)表面As-Sb合金的初期电结晶行为。绘制无因次电流暂态曲线,发现As-Sb合金的初期电结晶形核/生长过程遵循受扩散控制的三维形核模型。通过对电流暂态曲线分析计算得到相关形核参数。重点研究Sb(III)浓度对形核过程的影响。定量分析结果表明,Sb(III)能加快As-Sb合金的形核速度,从而使沉积物形貌由颗粒状结构转变为致密的层状结构。

关 键 词：arsenic ANTIMONY As-Sb alloy electrodeposition NUCLEATION 

分 类 号：TF801[冶金工程—有色金属冶金]