Abstract
The adsorption of CO 2 on thin evaporated iron films is studied at 196, 273, 300 and 370 K by means of volumetric measurements and measurements of equilibrium pressures, changes in work function and electrical resistance. Preadsorbed hydrogen only slightly influences the amount of a consecutive CO 2 adsorption at 273 K, but has a strong influence on the change in resistance due to the CO 2 adsorption. An iron film totally covered with CO 2 at 273 K is able to adsorb further hydrogen. Carbon dioxide and hydrogen seem not to compete for the same adsorption sites.
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