INFRARED SPECTRA OF HYDROGEN AND WATER ON GERMANIA GEL SURFACES

The reactions of H2, D2, H2O, and D2O with oxidized and reduced germania gel surfaces were studied. Bands at 3673, 3550, 3450 and 1620, and 2180 cm-1 were respectively ascribed to isolated Ge-OH groups, hydrogen-bonded surface hydroxyls, physically adsorbed H2O, and surface Ge-H structures. The extents to which the various structures were formed changed when the gel surface was reduced. Reduction almost completely eliminated the formation of isolated Ge-OH structures, although hydrogen-bonded structures were formed, and increased the surface Ge-H concentration. © 1969.