Oxygen hydrogen adsorption, effect

The effect of other surface impurities may be more severe than that of oxygen. For instance, adsorbed sulfur strongly inhibits hydrogen adsorption on nickel 58), while chlorine adsorbed on nickel is also likely to be a tenaciously held surface contaminant. 

Georgakis, M., G. Stavropoulos, G.P. Sakellaropoulos, Molecular dynamics study of hydrogen adsorption in carbonaceous microporous materials and the effect of oxygen functional groups. Int. J. Hydrogen Energ. 32(12), 1999-2004, 2007. 

Adsorption on molybdenum disulphide is important because of its effect on lubrication, and Kalamazov and co-workers , studied the adsorption of oxygen, hydrogen, nitrogen and water vapour. They found that after desorption at 900°C and 10 Pa (10 Torr) subsequent re-adsorption was at a lower level, and inferred that active adsorption sites had been destroyed by the vacuum and high temperature. They found that at 700°C adsorbed water vapour was dissociated, causing oxidation and the liberation of hydrogen. 

In (a) examples of reactions on the catalytic metal gates are displayed, as well as the effect of hydrogen and oxygen anion adsorption on the number of charge carriers in the channel. 

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