Abstract
AlCl3/amide (acetamide, propionamide, butyramide) ionic liquids were used as the electrolytes to study the electrodeposition behavior of aluminum on a tungsten electrode. Cyclic voltammograms on the tungsten electrode indicate that Al(III) ions can be reduced to aluminum only within the molar ratio range of 1.1 to 1.5 and the reduction potentials of Al(III) ions strongly depend on the molar ratio of AlCl3/amide. Raman spectra results reveal that the electroactive specie of AlCl3/amide ionic liquids is Al2Cl7 −. Aluminum coatings were prepared at −0.25 V (vs. Al/Al3+) and at 313 K in AlCl3/amide ionic liquids with the molar ratio of 1.3. The SEM and cross-sectional SEM images show that all the obtained aluminum films are silver-colored, thick, and adherent. The EDS and XRD analysis confirm that the obtained deposits are pure aluminum. The present results can provide a new route for aluminum electrodeposition under ambient conditions.
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Acknowledgments
The authors would like to express their gratitude for the financial support provided by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China (Grant No. 2012BAE08B01) and the National Natural Science Foundation of China (Grant Nos. 51574070, 51474060, 51322406, 51434005).
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Li, M., Gao, B., Liu, C. et al. AlCl3/amide ionic liquids for electrodeposition of aluminum. J Solid State Electrochem 21, 469–476 (2017). https://doi.org/10.1007/s10008-016-3384-3
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DOI: https://doi.org/10.1007/s10008-016-3384-3