The coupling effect between ferroelectric polarization and electrochemical processes makes possible the engineering of charge-carrier conduction characteristics at the heterojunction between a polarized ferroelectric catalyst and a chemical solution. It is well known that ferroelectricity can affect a material's surface physics which result into enhance catalytic properties. Ferroelectric materials have spontaneous polarization, which can be reoriented between equivalent domain states by an applied electric field. Therefore, ferroelectrics are potential material to achieve switchable surface chemistry for electrochemical applications.

In this work we are going to present polarization controlled electrocatalytic and photoelectrocatalytic activity of ferroelectric catalyst. The increase in remnant polarization shows appreciable enhancement in the electrochemical and photoelectrochemical activity towards OER in alkaline medium and waste water treatment. The photoelectrocatalytic acitivity was investigated for hazardous pharmaceutical pollutants.