钯铁合金共沉积行为及其成核机理的研究  

A Study on the Electrodeposition of Palladium-Iron Alloy and Its Electrocrystallization Mechanism

作　　者：徐明丽[1] 张正富[1] 杨显万[1] 李月丽[1] 赵逸群[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,昆明650093

出　　处：《材料导报》2006年第9期158-160,共3页Materials Reports

基　　金：国家自然科学基金(50161002);云南省自然科学青年基金(2001E0007Q);国家人事部2001年度博士后基金;云南省高等学校教学;科研带头人培养计划项目资助

摘　　要：应用循环伏安法和电位阶跃法研究了Pd-Fe合金电沉积的循环伏安特性与电结晶机理。结果表明,在以FeSO4·7H2O和Pd(NH3)2Cl2为主盐、磺基水杨酸(SSCS)为络合剂、(NH4)2SO4为导电盐所组成的镀液体系中,Pd-Fe合金共沉积经历了成核过程,而不是欠电位沉积,且其电沉积反应是一个不可逆过程;将Pd-Fe合金共沉积的恒电位暂态曲线进行拟合得知,其电结晶的成核过程属于三维瞬时成核方式。The electrodeposition and electrocrystallization mechanism of palladium-iron alloy are studied by the methods of cyclic voltammetry and potential step. The results show that in the system of the electrolyte solution which is made up of FeSO4 · 7H2O and Pd（NH3 ）2Cl2 being acted as the main salts, sulfosalicylic acid （SSCS） being the eomplexing agent and ammonium sulfate being the conductance salt, co-deposition of Pd-Fe alloy lives nucleation and no underpotential deposition; it＇s a irreversible process; according to the i～t curves of potential step, a conclusion can be drawn that the electrocrystallization of Pd-Fe alloy obeys the mechanism of instantaneous nucleation and three dimensional growth by attributing the potential step curve and calculating data of Pd-Fe alloy codeposition.

关 键 词：钯铁合金 电沉积 循环伏安 电位阶跃 成核机理 

分 类 号：TQ153.2[化学工程—电化学工业]