Interaction of Oxygen with Carbonaceous Layers on Ni(110) I: Dehydrogenated Ethylene Layers at Temperatures Less than 300 C.
RENSSELAER POLYTECHNIC INST TROY N Y DEPT OF MATERIALS ENGINEERING
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Previous studies of ethylene adsorption and decomposition on a Ni110 single crystal surface have been extended to measurement of the interaction of oxygen molecular beams with the carbonaceous layers formed in the ethylene adsorption process. A combination of Auger electron spectrometric and modulated molecular beam techniques have been used to measure the kinetics of oxygen adsorption and CO production on the surface. Results for oxygen adsorption on the clean Ni110 surface are in agreement with previous studies. For the surface formed by adsorbing ethylene on the clean nickel surface at room temperature, adsorption of oxygen results in formation of a surface layer of NiO without removal of carbon from the surface. Exposure of the ethyleneated nickel surface to oxygen at 260 C results in the removal of a fraction of the carbon, as CO, followed by NiO formation. Author
- Metallurgy and Metallography
- Atomic and Molecular Physics and Spectroscopy