The interaction of Fe(CO)(5) with H-adatoms was studied on a Ru(001) s
urface by thermal desorption spectroscopy. The desorption spectra show
ed, in addition to the normal hydrogen desorption peak from the Ru(001
) surface, two low temperature sharp peaks at 160 and 190 K coinciding
with the peaks due to the molecular desorption of Fe(CO)(5). This is
explained by a model suggesting the migration of H-adatoms into the mu
ltilayers of Fe(CO)(5) due to either the repulsive interaction between
H-adatoms and CO formed by the decomposition of Fe(CO)(5) on Ru(001)
or the attractive interaction between H-adatoms and Fe(CO)(5) molecule
s.