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The multiple roles of Pt are examined during NO and NO 2 storage in the presence of O 2 on a series of Pt/BaO/Al 2 O 3 catalysts spanning 0–3.7wt.% Pt and employing both a bench-scale monolith and TAP (Temporal Analysis of Products) reactor system. Pt enhances the storage of both NO and NO 2 , although the extent of enhancement diminishes at higher Pt loadings...
NO x storage and NO oxidation experiments have been carried out on a model Pt/BaO/Al 2 O 3 catalyst powder in order to elucidate kinetic and thermodynamic limitations. Uptake of NO on a pre-oxidized catalyst reveals the existence of multiple regimes. The short-term storage is a sensitive function of storage time, but is nearly independent of temperature whereas the long-time...
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