Journal
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
Volume 25, Issue 7, Pages 2458-2465Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1003-6326(15)63862-6
Keywords
electrodeposition; bright nickel; nucleation mechanism; betaine center dot HCl; ethylene glycol
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Funding
- National Natural Science Foundation of China [51274108, 21263007, 51204080]
- Applied Research Foundation of Yunnan Province, China
- Talents Cultivation Foundation of Kunming University of Science and Technology, China [14118441]
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The electrodeposition behaviors of nickel on glassy carbon (GC) and carbon steel (CS) electrodes were investigated in the 14.3%-85.7% (mole fraction) betaine center dot HCl-ethylene glycol (EG) ionic liquid using cyclic voltammetry and chronoamperometry. The results indicated that the reduction of Ni(II) on CS electrode via a diffusion-controlled quasi-reversible process was much more facile and easier than that occurred on GC electrode, which followed a diffusion-controlled three-dimensional instantaneous nucleation and growth. Scanning electron microscopy was used to observe that the deposit was dense and contained fine crystallites with average size of (80 +/- 4) nm. Energy dispersive spectrometer analysis showed that the obtained deposit was metallic nickel. X-ray diffraction spectroscopy indicated that (111) plane was the most preferred crystal orientation. The nickel deposit was luminous and bright, and had good adhesion with the CS substrate.
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