Determination of the rate of tetraethylammonium ion transfer across the water/1,2-DCE interface with steady-state voltammetry at a nano-ITIES. Theory and experiment

The rate of TEA+ ion transfer across the water/1,2-dichloroethane interface has been measured using steady-state voltammetry at a capillary with an orifice of nano-sized dimension. It is found that the average rate constant for TEA+ transfer from water to oil and from oil to water is 0.64cms−1. The results are repeatable using the same capillary. This value is similar to that measured previously using electrochemical impedance spectroscopy and fluctuation analysis at the micro-interface.