Abstract
Based on corresponding studies of H 2 and O 2 interaction with polycrystalline nickel, SIMS and TDMS investigations of O 2 and H 2 interaction with hydrogen, respectively oxygen covered polycrystalline Ni surfaces were carried out. O 2 exposure of a hydrogen covered surface only results in a removal of the hydrogen adsorption layer accompanied by the usual oxygen incorporation into the surface. H 2 exposure of nickel surfaces covered by various amounts of oxygen however results in the formation of OH groups on the surface with different binding energies. Heating of these hydroxide covered surfaces results in the disappearance of OH groups and simultaneous desorption of H 2O molecules.
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