POTASSIUM ADSORPTION AND REACTION WITH WATER ON MGO(100)

The growth of potassium him on MgO(100) and its effect on coadsorption of D2O have been investigated by core-level photoemission studies. XP S results indicate that K-atoms initially bind with surface oxygen of MgO(100), growing from 2D at theta(K) < 1 ML to 3D clusters with addit ional K-deposition. Coadsorbed D2O reacts actively with both K-adatoms and surface Mg2+ at 295 K, forming hydroxyl groups with O 1s BE in th e range 530-533 eV. (C) 1998 Elsevier Science B.V. All rights reserved .