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The Adsorption and Decomposition of Ethylene on Ni(110).
Technical rept. no. 4, 1 Apr 75-30 Mar 76,
RENSSELAER POLYTECHNIC INST TROY N Y DEPT OF MATERIALS ENGINEERING
Pagination or Media Count:
The interaction of ethylene gas with a Ni110 surface has been studied by a combination of modulated molecular beam mass spectrometry and Auger electron spectroscopy techniques. At temperatures below 350C, ethylene is chemisorbed with unity initial sticking coefficient up to a saturation coverage of one carbon atom per surface nickel atom. Above 150C, hydrogen evolution is observed concurrent with the adsorption process, the amount of hydrogen liberated corresponding to complete dehydrogenation of the ethylene. A physisorbed ethylene species is observed to coexist with the chemisorbed layer. Above 350C formation of a graphitic surface layer is observed. The results obtained are consistent with earlier photoemission spectrometric measurements of Demuth and Eastman.
APPROVED FOR PUBLIC RELEASE