ISSN:
1572-879X
Keywords:
Catalysis
;
effect of pressure
;
structure insensitive reactions
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract At 445 K, and equimolar ratio of reactants, the turnover rate for CO oxidation on unsupported and supported Pd is constant within experimental error between ≈ 0.1 and 100 mbar. As first proposed in 1922 by Langmuir, the overall rate is the rate of adsorption on a surface almost saturated with CO. Thus the rate is proportional to the ratio of concentrations of O2 and CO and is pressure independent. At quasi-saturation, the few vacant sites form an ideal dilute solution in the CO-Pd solvent. Adsorption on these sites is dominated by pressure invariant interactions with the solvent. Hence, the rate obeys Langmuir kinetics and the reaction is structure insensitive.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00763921
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