Journal of Applied Electrochemistry

, Volume 41, Issue 6, pp 705–712 | Cite as

Nucleation and growth of zinc on aluminum from acidic sulfate solution with [BMIM]HSO4 as additive

Original Paper
First Online:
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Abstract

The nucleation and first stages of the growth of zinc on aluminum from acidic sulfate solution in the absence and presence of 1-butyl-3-methylimidazolium hydrogen sulfate-[BMIM]HSO4 as additive were investigated using cyclic voltammetry, chronoamperometric current–time transients, and scanning electron microscopy techniques. The dimensionless chronoamperometric current–time transients for the zinc electrodeposition on aluminum electrode from the solution free of [BMIM]HSO4 showed the zinc deposition can be interpreted by a model involving instantaneous nucleation with hemispherical diffusion controlled growth of nuclei. The addition of [BMIM]HSO4 induced a blocking effect on the zinc electrocrystallization process through its cathodic adsorption on the electrode surface. This effect led to increase the number density of active sites, decrease the nucleation and growth rate of these nuclei, and produce more leveled and fine-grained cathodic deposits without affecting the instantaneous nucleation mechanism. Surface morphology analysis revealed the crystal structure of the zinc deposits formed did not change by the adsorption of [BMIM]HSO4 at the first stages of deposition.

Keywords

Zinc electrodeposition Ionic liquid Additive Nucleation and growth Morphology 
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Notes

Acknowledgments

The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (Projects no. 50864009 and 50904031) and the Research Fund for the Doctoral Program of Higher Education of China (Project no. 20070674001).

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Key Lab of Ionic Liquids Metallurgy, Faculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunmingChina

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