Hydrazine adsorption and the coadsorption of CO and D 2 with nitrogen atoms on Rh(100)

Abstract

Abstract The adsorption and decomposition of hydrazine on Rh(100) has been studied by thermal desorption, X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy. Molecular hydrogen, ammonia, molecular nitrogen and hydrazine desorbed from multilayers of adsorbed hydrazine. At temperatures between 500 and 550 K, atomic nitrogen was the only species remaining on the surface. The coadsorption of carbon monoxide and deuterium with various coverages of this atomic nitrogen has been investigated. The presence of nitrogen reduced the sticking coefficient of deuterium, shifted the adsorbed deuterium into more weakly held sites, and lowered the saturation coverage. The metal-carbon monoxide bond was weakened by the presence of atomic nitrogen. Using photoelectron spectroscopies, no new surface species, formed from the interaction of carbon monoxide with atomic nitrogen, were detected.