| PAN Bing-suo,FANG Xiao-hong,HUANG Zhi-qiang.Effects of Cerium Ions on the Electrocrystallization of Nickel[J],39(3):23-25 |
| Effects of Cerium Ions on the Electrocrystallization of Nickel |
| Received:January 23, 2010 Revised:June 10, 2010 |
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| DOI： |
| KeyWord:electrocrystallization cerium nucleation mechanism AC impedance |
| Author | Institution |
| PAN Bing-suo |
China University of Geosciences, Wuhan , China |
| FANG Xiao-hong |
China University of Geosciences, Wuhan , China |
| HUANG Zhi-qiang |
China University of Geosciences, Wuhan , China |
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| Abstract: |
| To understand the cathodic process of nickel electrodeposition, linear sweep voltammetry, single potential step chronoamperometry and electrochemical impedance spectroscopy were employed to comparatively study the electrocrystallization of nickel in watts bath and watts bath containing cerium ions. The experimental results show that the addition of CeCl3decreases the diffusion coefficient of Ni2+ and enhances charge transfer resistance, resulting in the increase in cathodic polarization; Simultaneously, it increases the nucleation rate constant of electrocrystallization of nickel on glassy carbon electrode and reduces the outward growth rate of crystal. These changes can result from the adsorption of Ce3+ and Ce3+ multi-core complex ions on cathode surface. However, the addition of Ce3+ does't change the nucleation and growth mechanism of nickel electrocrystallization on glassy carbon electrode. |
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