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Aluminum Deposition from Lewis Acidic 1‐Butyl‐3‐Methylimidazolium Chloroaluminate Ionic Liquid ([Bmim]Cl/AlCl 3 ) Modified with Methyl Nicotinate
Author(s) -
Wang Qian,
Chen Bin,
Zhang Qinqin,
Lu Xingmei,
Zhang Suojiang
Publication year - 2015
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201500213
Subject(s) - ionic liquid , cyclic voltammetry , chemistry , deposition (geology) , copper , aluminium , electrochemistry , inorganic chemistry , electrode , nuclear chemistry , catalysis , organic chemistry , paleontology , sediment , biology
The potentiostatic electrodeposition of aluminum (Al) on copper (Cu) substrates from [Bmim]Cl/AlCl 3 (33.3/66.7 mol %) ionic liquid (IL) containing different concentrations of methyl nicotinate (MN) was studied at 303 K. It was found that the grain size of the deposits decreased from micron‐sized to nanoscale and the preferred Al(200) crystallographic orientation became stronger when increasing the concentration of MN from 2 to 8 mmol L −1 . At a modest potential, a mirror‐bright Al coating could be obtained when the concentration of MN was no less than 4 mmol L −1 . Furthermore, atomic force microscopy and cyclic voltammetry were used to investigate the effect of MN on the electrodeposition of Al, which demonstrated that MN acted simultaneously as a brightener and a leveling agent by adsorbing on the electrode surface, producing Al coatings with a highly uniform and smooth surface.