Electrodeposition of Selenium from the l-Ethyl-3-methylimidazolium Chloride-Tetrafluoroborate Room-Temperature Ionic Liquid

摘要

Electrodeposition of the selenium film in l-ethyl-3-methylimidazolium chloride-tetrafluoroborate ionic liquid containing excess chloride ions on indium tin oxide (ITO) coated glass electrodes was studied at 30°C. Cyclic voltammogrammetric results indicate that the reduction reaction of Se(Ⅳ) to Se(0) is not a simple four-electron reduction. Scanning electron microscopy reveals that the morphology of the selenium deposits is affected by the applied deposition potential and X-ray powder diffraction data indicates the Se deposits is the crystalline of t-Se phase.