Functionalized Hybrid Organic-Inorganic Membranes investigated by ac-electrogravimetry

摘要

In this paper, original hybrid membranes, made through sol gel techniques, were characterized by using ac-electrogravimetry measurements. In order to perform experiments, a polypyrrole-heteropolyanion film was generated between the working electrode of the microbalance and the hybrid film. This mediator mixed conducting membrane is necessary to provide protons transfer between the different interfaces and therefore, proton transport inside the hybrid film which is only an ion conductor. If the classical proton transfer was demonstrated, the role of the free solvent was also pointed out: the relative species concentration, separately for each species, charged or not, was estimated according to the applied potential.