Open AccessAnodic dissolution of metals in ionic liquids
Author(s) -
Andrew P. Abbott,
Gero Frisch,
Jennifer M. Hartley,
Wrya O. Karim,
Karl S. Ryder
Publication year - 2015
Publication title -
progress in natural science materials international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 63
eISSN - 1745-5391
pISSN - 1002-0071
DOI - 10.1016/j.pnsc.2015.11.005
Subject(s) - deep eutectic solvent , ionic liquid , passivation , c4mim , dissolution , materials science , electrolyte , choline chloride , metal , inorganic chemistry , ethylene glycol , eutectic system , chloride , chemical engineering , ionic bonding , salt (chemistry) , electrode , alloy , ion , metallurgy , chemistry , nanotechnology , organic chemistry , catalysis , layer (electronics) , engineering
The anodic dissolution of metals is an important topic for battery design, material finishing and metal digestion. Ionic liquids are being used in all of these areas but the research on the anodic dissolution is relatively few in these media. This study investigates the behaviour of 9 metals in an ionic liquid [C4mim][Cl] and a deep eutectic solvent, Ethaline, which is a 1:2mol ratio mixture of choline chloride and ethylene glycol. It is shown that for the majority of metals studied a quasi-passivation of the metal surface occurs, primarily due to the formation of insoluble films on the electrode surface. The behaviour of most metals is different in [C4mim][Cl] to that in Ethaline due in part to the differences in viscosity. The formation of passivating salt films can be decreased with stirring or by increasing the electrolyte temperature, thereby increasing ligand transport to the electrode surface
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