Investigation of Current Oscillatory Phenomena at the Liquid/Liquid Interface with a Three-Electrode Potentiostat

A current oscillatory phenomenon was investigated systematically at the liquid/liquid interface with a three-electrode potentiostat in combination with cyclic voltammetry. We have focused our attention on the study of the electrostatic interaction between charged particles at the W/DCE interface in this paper. The experimental results demonstrate that the oscillation is caused by the specific adsorption of ion pairs at the liquid/liquid interface between Fe(CN) 6 4― in the aqueous phase and TBA + in the organic phase. A specific adsorption of ion pair model based on an oscillatory phenomenon is proposed for the first time, which is significant for us to understand the structure of the L/L interface better and to explain the properties of the interesting nonlinear oscillation patterns. A spectrophotometric experiment was performed to evidence a strong attractive interaction between Fe(CN) 6 4― and TBA + .