Electrodeposition of Selenium in a Hydrophobic Room-Temperature Ionic Liquid

Abstract

Electrodeposition of selenium (Se) in an amide type hydrophobic room temperature ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide (BMPTFSA) containing SeCl 4 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 SeCl 4 in BMPTFSA with excess chloride forms an octahedral chlorocomplex of [SeCl 6 ] 2-. The reduction of [SeCl 6 ] 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.

Electrodeposition of Metals and Preparation of Metal Nanoparticles in Nonaqueous Electrolytes and Their Application to Energy Devices

“…We investigated the electrodeposition of various metals and the electrochemical behaviors of metal ions using RTILs composed of aliphatic cations and TFSA anion, which have a high reduction stability and relatively low viscosity. [42][43][44][45][46][47][48][49][50][51][52][53] Pd and Pt are two of the important metals used in scientific and industrial fields owing to their good physical and chemical properties such as corrosion and wear resistance. Therefore, the electrodeposition of Pd and Pt from RTILs has been extensively investigated; however, the precursor metal salts were limited to halogeno complexes.…”

Potential Application of Ionic Liquids for Electrodeposition of the Material Targets for Production of Diagnostic Radioisotopes

“…The authors concluded that a single selenium phase was observed at elevated temperatures (100 °C) in contrast to room temperature conditions where amorphous Se was deposited. Saha et al [ 97 ] applied the same IL. The plating procedure required application potential of −1.4 V (vs. Ag│Ag I RE) to glassy carbon electrode.…”

Electrochemical Reduction of Selenium Ions From Organic Solution

“…In the literature, there are some works devoted to electroreduction or deposition of selenium ions in various ways [11][12][13][14][15][16][17][18][19]. Among these methods, the electrochemical method is the most extended and it always attracts great interest of researchers.…”

“…The electrochemical formation of selenium (Se) nanoparticles in an amide-type ionic liquid containing selenium tetrachloride (SeCl 4 ), was studied in the presence of an excess chlo-ride anion on a glassy carbon electrode [16,17]. The electrochemical reduction of [SeCl 6 ] 2led to the deposition of Se on the electrode surface.…”