부산대학교 도서관

The adsorption of hydrogen (deuterium) and oxygen on neutral platinum clusters has been investigated in a cluster beam experiment. The beam passes through two low-pressure reaction cells and the clusters, with and without adsorbed molecules, are detected by laser ionization and mass spectrometry. Both H[SUB2] and O[SUB2] adsorb efficiently on the platinum clusters with only moderate variations with cluster size in the investigated range, i.e., between 7 and 30 atoms. The coadsorption of H[SUB2] and O[SUB2] results in the formation and desorption of H[SUB2]O, detected as a decreasing number of adsorbed oxygen atoms with an increasing number of collisions with H[SUB2] molecules. The water-formation reaction proceeds efficiently on all investigated clusters with more than seven atoms. [ABSTRACT FROM AUTHOR]