Voltammetry at microITIES supported at the tip of a micropipette

Charge Transfer across Liquid—Liquid Interfaces

“…19. 152 Such a difference of diffusion regimes can be used as a tool to determine which ion limits the potential window. In the case of the systems shown in Fig.…”

Interface Between Two Immiscible Liquid Electrolytes: A Review

“…Systematic electrochemical treatment did not begin until the late 1970's when Koryta et al 103 demonstrated that the liquid/liquid interface lends itself to the same formalism as a solution/ metal interface and that similar, if not identical, experimental methodology could be used. This led soon to development of various electrochemical techniques to study the liquid/liquid interface, including, among others, studies of the solvent dropping interface [103][104][105][106][107][108] , and studies of cyclic voltammetry 108 , impedance measurements [109][110][111][112] , drop pressure method 113 , galvanostatic pulse method 114,115 , stripping voltammetry 114 , voltfluorometry [116][117][118][119] , and transport across a microinterface [120][121][122][123][124][125] . Electron transfer and photoinduced electron transfer have been also observed on ITIES or theoretically treated 19,84,86,87,[126][127][128][129][130][131][132][133] , as well as electrochemical catalysis 19,126,127,134,135 , adsorption …”

Simple Ion Transfer at Liquid|Liquid Interfaces

“…These two different processes can be easily distinguished during cyclic voltammetric experiments, as the egress and ingress transfers lead to a peak-shaped current response and to a steady-state current, respectively. This asymmetry can be used for the identification of the ion associated with the current observed, particularly when trying to determine which ionic species are responsible for limiting the potential differences range available, the so-called potential window [90,91]. Studies of charge transfer processes at μ-ITIES have been reported by several authors during the last years .…”

“…Stewart et al [90], performed an approximate solution for cyclic voltammetry of ion transfer at a micropipette assuming that the diffusion of the ions for ingress transfer takes place in a hemispherical way and the egress transfer in a planar diffusion way. Murtomäki and Konturri [97] combined a microhole ITIES with ac impedance and developed a simple model for calculating the faradaic impedance at the equilibrium and at the formal potential.…”