TITLE:
Gravimetric Studies of Ni Electrodeposition with Additives from Deep Eutectic Solvents Using Electrochemical Quartz Crystal Microbalance EQCM
AUTHORS:
K. Elttaib, A. Benhmid
KEYWORDS:
Electrodeposition, Quartz Crystal Microbalance, Ethaline, Reline, Eth-ylene Diamine, Acetylacetonate, Current Efficiency, Ionic Liquids
JOURNAL NAME:
Open Journal of Physical Chemistry,
Vol.10 No.2,
April
3,
2020
ABSTRACT: The
gravimetric analysis of electrodeposited nickel is demonstrated using electrochemical quartz crystal
microbalance (EQCM) where the nickel coatings come from a
solution of the metal chloride salt separately in either a1choline chloride: 2
ethylene glycol (ethaline) or 1 choline chloride: 2 urea (reline) based ionic
liquid. The possibility of adapting the Quartz Crystal Microbalance EQCM (which
measures the mass attached to the electrode) to probe kinetics of
electrochemically-driven solid state phase transformations has been explored in
a Ni electrodeposition in absence and presence of complexing agents ethylene
diamine en and acetylacetonate acac from both electrolytes ethaline and reline.
The study shows that the current efficiency and the rate of deposition of
nickel coatings obtained from ethaline and reline baths in absence of
brighteners en and acac are different, and the addition of en and acac to both
ionic liquid solutions results in a significant decrease current. And the
associated growth rate will also be decreased, suggesting that the en acac stops the
formation and growth of Ni nuclei. This suggests that the mechanism of growth
is changed.