Abstract
The amount of carbon monoxide adsorbed on palladium in the course of the catalyzed reaction, CO + 1 2 O 2 → CO 2 at 450 K was determined through analysis of the transient CO 2 formation which occurs following a carbon monoxide pressure jump. The results were compared with CO adsorption data obtained by flash desorption. The results of the two methods are in good accord. The amount of CO adsorbed when p CO > p O 2 is almost equal to that determined in the CO Pd equilibrium system (nonworking conditions). A sharp decrease in CO(a) is noted around p CO ∼- p O 2 and CO(a) becomes very small when p CO < p O 2 . The inhibitory effect of CO(a) on the steady-state CO oxidation reaction is discussed on the basis of these CO adsorption isotherms determined under working conditions.
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