Abnormal infrared effects on bismuth thin film-EMImBF4 ionic liquid interface

作者：Romann T^*; Oll O; Pikma P; Lust E

来源：Electrochemistry Communications, 2012, 23: 118-121.

DOI：10.1016/j.elecom.2012.07.022

• Bismuth film
• EMImBF4
• SEIRAS
• In situ infrared spectroscopy
• Dried ionic liquid
• 1,5-Diethyl-4,8-dimethyl-1,4,5,8-tetraazafulvalene

In situ infrared measurements under potential control were carried out in 1-ethyl-3-methylimidazolium tetrafluoroborate (EMImBF4) room-temperature ionic liquid (IL) using magnetron sputtered Bi films as the working electrodes. Unexpectedly, it was found that the spectra measured with s-polarized light were more intensive and the absorption peaks had a different direction compared to the p-polarized spectra. This work gives a description and an explanation of this phenomenon. Imidazolium cation dimerization was detected at potential E %26lt; -2 V and bismuth oxidation and dissolution at E %26gt; + 0.6 V vs. Ag vertical bar AgCl wire in the same IL.

• 出版日期2012-9