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Titration of oxygen chemisorbed on platinum: Experiment and simulation

✍ Scribed by Fu-hsiang Tseng; J. M. White

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
573 KB
Volume
12
Category
Article
ISSN
0538-8066

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✦ Synopsis

Abstract

The titration of chemisorbed oxygen by carbon monoxide to form carbon dioxide has been studied from 373 to 673 K over polycrystalline platinum. The pressure transients for CO and CO~2~ have been measured and simulated numerically. A complex Langmuir–Hinshelwood mechanism is found which fits all the data, and it is not necessary to invoke Eley–Rideal kinetics. The results fall into two temperature regimes, above and below 473 K, which are characterized by different Arrhenius parameters. A change in activation energy with oxygen coverage is also found below 473 K.

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