期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 168, 期 4, 页码 -出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1945-7111/abf50b
关键词
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资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT)
- Keio Leading-edge Laboratory of Science and Technology (KLL), Japan
In this study, electrodeposition of cobalt was investigated in an amide-type ionic liquid under an external magnetic field. The results showed that nanowire-shaped deposits composed of metallic cobalt nanoparticles were formed at 25 degrees Celsius in the presence of the magnetic field.
Electrodeposition of Co was investigated in an amide-type ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide (BMPTFSA), under an external magnetic field. Neodymium magnets were used as a source of the magnetic field, which was parallel to the ionic current during the electrodeposition of Co on a glassy carbon electrode. Potentiostatic cathodic reduction applying -1.6 and -2.0 V vs Ag divide Ag(I) under the magnetic field in BMPTFSA containing Co(TFSA)(2) at 25 degrees C gave nanowire-shaped deposits on the electrode surface. The deposits were found to be composed of Co, which was confirmed by energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy. However, no diffraction peak was observed in the deposits by X-ray diffraction. The nanowires were further examined by transmission electron microscopy. The lattice fringe corresponding to (111) plane of Co was found in the deposits, indicating the nanowires were composed of metallic Co nanoparticles. Therefore, crystalline Co nanoparticles were considered to be formed in the presence of the magnetic field.
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