Liis Siinor, C. Siimenson, V. Ivaništšev
Mar 1, 2012
Citations
0
Influential Citations
46
Citations
Journal
Journal of Electroanalytical Chemistry
Abstract
Abstract Cyclic voltammetry, electrochemical impedance spectroscopy, and computational chemistry methods have been applied for investigation of electrochemically polished Bi(1 1 1) electrode in 1-butyl-4-methylpyridinium tetrafluoroborate (BMPyBF 4 ) ionic liquid. The region of ideal polarizability, series resistance and capacitance, limiting high-frequency and low-frequency capacitances have been obtained and compared with those established for 1-ethyl-3-methylimidazolium tetrafluoroborate (EMImBF 4 ). Differently from Bi(111)|EMImBF 4 interface, noticeably more expressed influence of the mass transfer limited step on the electrical double layer formation kinetics has been demonstrated and explained by the higher viscosity of BMPyBF 4 . Possible reasons of the lower values of series capacitance for Bi(111)|BMPyBF 4 compared with Bi(1 1 1)|EMImBF 4 interface has been examined on the basis of modern theoretical models.