Adsorption and Dissociation of CO2 on Ru(0001)

The adsorption and dissociation of carbon dioxide on a Ru(0001) single crystal surface was investigated by reflection absorption infrared spectroscopy (RAIRS) and temperature-programmed desorption (TPD) spectroscopy for CO2, adsorbed at 85 K. RAIRS spectroscopy shows that the adsorption of CO2, on a Ru(0001) single crystal is partially dissociative, resulting in CO2, and CO2. The CO2 vibrational mode was also observed to split into two distinct modes, indicating two general populations of CO2 present at the surface. Furthermore, a time-dependent blue-shift is observed, which is characteristic of increasing CO2 surface coverage. TPD showed that coverages of up to 0.3 ML were obtained, and no evidence for chemisorption of oxygen oia ruthenium was found.