Abstract
The kinetics of N 2O decomposition on polycrystalline Pt is studied over a wide range of surface temperatures (400 < T < 1200 °C) and pressures (0.01 < P N 2O < 0.50 Torr) in a steady-state flow system with conversions less than 6% so that differential rates are obtained. It is found that a single Langmuir-Hinshelwood (LH) rate expression correlates all rate data within ± 10% at all temperatures and pressures to give a reaction activation energy of 34.9 kcal/mole and a heat of adsorption of N 2O of 21.3 kcal/mole. A simple reaction mechanism which can give this rate expression is also proposed.
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