Abstract
Electrodeposition of selenium (Se) in an amide type hydrophobic room temperature ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide (BMPTFSA) containing SeCl4 as a Se source in the presence of excess chloride on a glassy carbon electrode was studied at 25 and 50°C. Raman spectroscopy showed SeCl4 in BMPTFSA with excess chloride forms an octahedral chlorocomplex of [SeCl6]2–. The reduction of [SeCl6]2– to Se and that of Se to Se(–II) were observed by cyclic voltammetry. Electrodeposits obtained by potentiostatic electrolysis were confirmed to be metallic Se by energy dispersive X-ray, X-ray diffraction, Raman spectroscopy and X-ray photoelectron spectroscopy.
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