Abstract

The interaction of atomic and molecular hydrogen with surfaces of Al and Na has been investigated with electron energy loss spectroscopy, thermal desorption, and work function measurements. After exposing these surfaces at T⩾ 100 K to H 2, no evidence was found for adsorption of either molecular or atomic hydrogen; however, after exposure to atomic hydrogen, adsorbed H was observed. The adsorption sites, work function changes and desorption behavior are discussed in relation to existing theories using jellium and modified jellium substrates.

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