“…These bands can be assigned to symmetric stretching mode and bending mode of adsorbed water, n(OH) and d(HOH), respectively. 16,17 Their wavenumbers are quite different from those of bulk water, but are rather similar to those of water monomer, i.e., weakly hydrogen-bonded water molecules adsorb on Pt-Ru alloy surface. According to the surface selection rule, 8 the water is adsorbed on the surface with its C 2 axis perpendicular to the surface.…”