A Fourier-transform spectral-ratioed reinvestigation of the infrared spectra from H2and D2adsorbed on ZnO at room temperature and at 160 °C

Ratio-recorded Fourier-transform infrared spectra from H2 and D2 adsorbed on Kadox 15 zinc oxide have provided better quality data than previously, particularly in the low-wavenumber region 1200–600 cm–1 which is overlapped by multi-phonon absorptions involving ZnO lattice fundamentals. No evidence was found for a band at 1125 cm–1 postulated from inelastic neutron scattering work and attributed to a δ(OH) mode from type I adsorbed hydrogen. On the other hand, the presence of two absorptions at 840 and 820 cm–1, attributed to δ(OH) and δ(ZnH) modes, was confirmed. Absorptions from type II adsorbed hydrogen were also recorded.