Abstract

The adsorption and desorption of some vapors and gases (water, hydrogen, dinitrogen oxide, carbon monoxide, oxygen) on Ru film has been investigated at 305 K using a Tian-Calvet microcalorimeter. The initial heat of adsorption, the irreversible coverage and the temperature of maximum desorption rate indicate the following binding energy order: H2>N2O>H2O>CO>O2. The amount of photoadsorption (for H2O, N2O, H2) and photodesorption (for CO and O2) has also been determined by recording the pressure changes induced by UV irradiation of the Ru film.

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