Effect of Thermal Activation of Supported Catalysts Pt/MeOx, Where MOx= Al2O3, CeO2, La2O3, and ZrO2, for Complete Oxidation

Autor: Chzhu, D., Tsyrul'nikov, P., Kudrya, E., Smolikov, M., Borbat, V., Bubnov, A.
Zdroj: Kinetics and Catalysis; May 2002, Vol. 43 Issue: 3 p379-383, 5p
Abstrakt: A sharp increase in the atomic catalytic activity (ACA) of supported platinum catalysts in the model reaction of n-pentane complete oxidation is found on going from the preliminary calcination temperature of 500–600°C to a temperature of 700°C. ACA increases by an order of magnitude for the Pt/γ-Al2O3system, ∼3 times for Pt/ZrO2, and ∼1.5 times for Pt/CeO2. The per-gram activities of all catalysts decrease because of a decrease in the dispersion of supported platinum with an increase in the temperature of preliminary calcination.
Databáze: Supplemental Index