Electrochemical study of cations and anions transfer across water/1,2-dichloroethane interface facilitated by propylene carbonate

摘要

In our work, the transfer reactions of four cations ( Na+, K+, Mg2+, Ca2+) and seven anions - (Br-, NO3-,HPO42-, SO42-, CO4-,NO2-) across the micropipette supported water/1,2-dichloroethane (W/1,2-DCE) interface facilitated by propylene carbonate (PC) were investigated by cyclic voltammetry ( CV) and differential pulse voltammetry (DPV) techniques. Well-defined voltammetric behaviors were obtained for all ions. The electrochemical data were used to determine the thermodynamic parameters (diffusion coefficient, standard Gibbs energy of transfer, stoichiometric ratio and the apparent association constant) of the facilitated ion transfer processes.