If two homogeneous bulk phases meet there is a region of finite thickness where the properties changed that region is called interface. At a molecular level the thickness of the interfacial region is not zero, and it is significant. The properties of interfacial region can be important for colloid systems, especially for dispersions, where the surface to volume ratio is not negligible. Electrochemistry at liquid –liquid interface is concerned with three main types of charge-transfer reactions, namely- (a) ion-transfer (IT) reactions from one phase to another; (b) IT reactions assisted by the presence of a complexing agent; and (c) Electron transfer(ET) reaction between hydrophillic and hydrophobic redox couple.