Comparative study of the underpotential deposition of Bi in an aqueous electrolyte and an ionic liquid

Tamura, Kazuhisa   

The underpotential deposition of Bi on Au(111) electrode in 1 M HClO solution and 1-butyl-3-methylimidazolium tetrafluoroborate was investigated using visible light reflectance measurement and surface X-ray scattering techniques. The electrosorption valency of the UPD reaction of Bi was elucidated and it was found that in both 1 M HClO and 1-butyl-3-methylimidazolium tetrafluoroborate the electrosorption valency was smaller than 3, but the detail process in the UPD reaction was different between in two electrolytes. The difference may be originated from the difference in the solvation status of Bi rather than the electrical double layer structure.