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A novel viewpoint of an imidazole derivative ionic liquid as an additive for cobalt and nickel electrodeposition

Omar, Inam M. A. and Emran, Khadijah M. and Aziz, Madzlan and Al-Fakih, Abdo M. (2020) A novel viewpoint of an imidazole derivative ionic liquid as an additive for cobalt and nickel electrodeposition. RSC Advances, 10 (53). pp. 2046-2069. ISSN 2046-2069

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Official URL: http://dx.doi.org/10.1039/d0ra06510b

Abstract

Thin films of Co and Ni electroplated onto a copper electrode from acidic sulfate and Watts baths, respectively, were investigated. The use of an ionic liquid additive in the electrolyte is widespread for producing thin films by electrodeposition. In the present work, the influence of a new ionic liquid, namely, 1-methyl-3-((2-oxo-2-(2,4,5-trifluorophenyl)amino)ethyl)-1H-imidazol-3-ium iodide (Im-IL), in the electrodeposition of two metals was investigated using cathodic polarization (CP), cyclic voltammetry (CV), and anodic linear stripping voltammetry (ALSV) measurements and cathodic current efficiency (CCE%). The surface morphology of the Co- and Ni-coated samples was examined using Scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and atomic force microscopy (AFM). The corrosion protection of the Co and Ni samples in a marine environment (3.5% NaCl solution) was studied by the potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The results show that the addition of Im-IL inhibits Co2+and Ni2+deposition, which leads to more fine-grained deposits, especially at low Im-IL concentrations. The inhibition of Co2+and Ni2+reduction in the presence of Im-IL ions occursviaadsorption, which obeys the Langmuir adsorption isotherm. The CCE% is higher in the presence of Im-IL. SEM images show smoother deposits of Co and Ni in 1 × 10−5M and 1 × 10−4M Im-IL solution respectively. The results prove that Im-IL acts as an efficient additive for electroplating soft Co and Ni films.

Item Type:Article
Uncontrolled Keywords:ionic liquid additive, electrodeposition
Subjects:Q Science > QD Chemistry
Divisions:Science
ID Code:93232
Deposited By: Widya Wahid
Deposited On:19 Nov 2021 03:23
Last Modified:19 Nov 2021 03:23

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