Conditions for a rate-maximizing temperature in heterogeneous catalysis

Conditions are derived for Langmuir-Hinshelwood and Eley-Rideal heterogeneous catalytic reactions to have a reaction rate maximum as a function of temperature. Experimental results contradict previously derived conditions which assumed that the surface diffusion was governed by a single transition r...

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Bibliographic Details
Published inJournal of catalysis Vol. 61; no. 1; pp. 270 - 276
Main Authors Shlesinger, Michael F., Landman, Uzi
Format Journal Article
LanguageEnglish
Published Elsevier Inc 1980
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Summary:Conditions are derived for Langmuir-Hinshelwood and Eley-Rideal heterogeneous catalytic reactions to have a reaction rate maximum as a function of temperature. Experimental results contradict previously derived conditions which assumed that the surface diffusion was governed by a single transition rate. More than one transition rate will enter the analysis of surface diffusion if the surface is heterogeneous or, as observed in field ion microscope experiments, the reactant passes through several nonequivalent configurations while migrating. An analysis of the rate of reaction when more than one transition rate is involved leads to a condition which could facilitate the interpretation of rate maximum reaction mechanisms.
ISSN:0021-9517
1090-2694
DOI:10.1016/0021-9517(80)90364-4