Raman scattering of hydrogen chemisorbed on silica‐supported nickel

Abstract The chemisorption of hydrogen on silica‐supported nickel has been investigated by Raman spectroscopy at low temperatures. In the spectral range of 200–2500 cm −1 , three systems of vibrational bands are detected. The vibrational bands in the high frequency range at 1999 cm −1 and 2030 cm −1 are interpreted as ṽ(NiH) stretching vibrations of a linear chemisorbed species. At 950 cm −1 a weak broad vibrational band is observed, which is assigned to a multibonded surface species. Two vibrational modes in the spectral range of 600–800 cm −1 result from δ(NiH) deformation vibrations of chemisorbed hydrogen. The spectral data are compared with the vibrational spectrum of chemisorbed deuterium.