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

水溶液中とイオン液体でのBi UPD反応の比較に関する研究

田村 和久   

Tamura, Kazuhisa

Au(111)上のBiのUPD反応に関して、1M HClO中と[BMIM]BF中での反応を比較した。可視光反射率測定および表面X線散乱測定を行った結果、Biの反応電子数はどちらの電解液中でも同じ値であったが、一方で反応過程は大きくことなることが分かった。この違いは、Biの溶媒和の違いに起因すると思われる。

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.