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Journal of Electrochemistry ›› 2018, Vol. 24 ›› Issue (5): 546-554.doi: 10.13208/j.electrochem.161123

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Electrodeposition of Cobalt from Eutectic-Based Ionic Liquid

M. Rostom Ali1*, S Sankar Saha2, Md Ziaur Rahman1,3   

  1. 1. Department of Applied Chemistry and Chemical Engineering, University of Rajshahi, Rajshahi-6205, Bangladesh; 2. Department of Chemistry, Rajshahi University of Engineering and Technology, Rajshahi-6204, Bangladesh; 3. Shamsur Rahman Model College, Faridpur, Pabna, Bangladesh
  • Received:2016-11-23 Revised:2017-06-16 Online:2018-10-28 Published:2018-05-25
  • Contact: M.Rostom Ali E-mail:dmrali@yahoo.com
  • Supported by:
    The University of Rajshahi for financial support of this work (Grand Reference No. 712/5/52/RU/Eng-01/2013)

Abstract: The electrodeposition of cobalt from a solution containing cobalt chloride in either a urea-choline chloride based or an ethylene glycol (EG)-choline chloride based ionic liquid has been carried out onto copper and steel cathodes by constant current and constant potential methods at different temperatures. The influences of various experimental conditions on electrodeposition and morphology of the deposited layers have been investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD)technique. It has been shown that the smooth, shiny with good adherence and bright metallic coloured cobalt coatings were obtained from both urea and EG based ionic liquids at the applied deposition potentials up to -0.8 V and applied deposition current densities up to -6.0 A·m-2 by the addition of 0.05 mol·L-1 P2O5 at temperatures ranging from 30 to 90 ℃. The cathodic current efficiency for the deposition of cobalt reached 98%.

Key words: electrodeposition, reline, ethaline, cobalt, cyclic voltammetry

CLC Number: