Characterization of titanium silicalite using TS-1-modified carbon paste electrodes

Abstract

Cyclic voltammetry has been used to characterize the redox system Ti4+/Ti3+ inside the channels of the titanosilicalite TS-1. Ti4+ ions, which are believed to be incorporated in the zeolite framework, can easily be reduced and oxidized. The charge imbalance resulting from the reduction of Ti4+ to Ti3+ is compensated by the electrolyte cations migrating through the porous structure of the material. The intensity of the electrochemical current is proportional to the fraction of titanium atoms substituting silicon atoms in the lattice. © 1993.