Electrochemical Study of Encapsulated Heteropolyacids in Acidic Mordenite Zeolite

12-molybdophosphoric acid (PMo12) was encaged into HMOR zeolite by “ship in a bottle”method in aqueous phase which is strongly retained and not easily leached from the host channels.The solid was characterized by XRD prior to using it for the electrode preparation. This compoundwas incorporated with a carbon paste electrode for cyclic voltammetric measurements. PMo12immobilized on the support underwent a quasi-reversible electrochemical redox reaction. Invarious electrolyte solutions and also changing the pH range from 0 to 5, the ΔEp remainspractically constant, i.e. 179mV. The comparison of these voltammograms with those in aqueousphase shows remarkable similarities, therefore it is may concluded that this hybrid material hasredox catalytic properties and high surface area, simultaneously.