摘要
通过电化学测试方法,初步探讨了硫酸镍体系中电解铜箔镀镍的某些动力学问题。结果表明,镍阴极电沉积的Tafel斜率为0.106 V,表观传递系数为0.58,交换电流密度为1.14×10-7A/cm2,电极反应表观活化能为61.1 kJ/mol。在0.5~0.6 V的电位范围内,第一电子传递反应为电极反应的速度步骤控制,而在较高的阴极极化电位下,镍电沉积是混合步骤控制。
Electrochemical method was used to simply investigate some kinetic questions of the Nickel plating of electrolytic Copper foil in the system of NiSO4 solution. The results were indicated as follows: Tafel slope was 0. 106 V ; apparent transfer coefficient was 0.58 ; exchange current density was 1.14×10^-7 A/cm^2, electrode reaction apparent activation energy was 61.1 kJ/mol. The first electron transfer reaction was the rate - determining step in the range of voltage from 0.5 - 0.6 V, however the electron reaction was controlled by mixed step when cathodic electron polarization potential was made more negative.
出处
《湖南有色金属》
CAS
2007年第4期12-13,58,共3页
Hunan Nonferrous Metals
关键词
硫酸镍体系
Tafel斜率
表观传递系数
交换电流密度
表观活化能
the system of NiSO4 solution
Tafel slope
apparent transfer coefficient
exchange current density
apparent activation energy