Proton diffusion and conduction in nanoporous glasses.

Abstract

Conduction and diffusion of proton in nanoporous silica glasses were studied from dielectric relaxation and Pulse Field Gradient (PFG) NMR spectra. The glasses with average pore size of 2.2 nm and <1nm were prepared by the sol-gel method using different materials. The glass having large pores exhibited a high proton conductivity and high diffusion coefficient. These results were discussed to relate with the confinement effect of proton by the pores.