An investigation was made of H transport through amorphous or crystalline films which had been prepared via radio-frequency magnetron sputtering onto In2O3 glass, under impermeable boundary conditions in 0.1M H2SO4 solution, by using Fourier-transform infra-red spectroscopic, cyclic voltammetric, potentiostatic current-transient and alternating-current impedance techniques. The Fourier-transform infra-red spectra showed that the amorphous films contained water. From the results of the electrochemical experiments, it was deduced that the differing cyclic voltammetric behaviours of amorphous and crystalline films were due to the open structure of amorphous films which contained H2O. The latter did not exist in the crystalline film. There were 3 types of H injection site in the films. These were a reversible active site, a shallow trap site (reversible trap) and a deep trap site (irreversible trap).

Hydrogen Transport through rf-Magnetron Sputtered Amorphous and Crystalline WO3 Films with Hydrogen Trap Sites. S.I.Pyun, D.J.Kim: Molecular Crystals and Liquid Crystals, 1999, 311, 851-6