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The effect of finely coating Cu-ZSM-5 with nanoparticles of ceria has been studied in situ by XANES, DRIFTS and TPR. The combination of these techniques reveals a lower temperature of reduction for both metals (Cu and Ce) in the bifunctional catalyst. Copper interacts with ceria nanocrystals at the oxide-zeolite interface and forms a localized phase comparable to doped ceria solid solutions commonly...
Bifunctional catalysts comprising metal-exchange zeolites coated by metal oxides have been prepared and shown to be active catalysts for the selective catalytic reduction of NO x with propylene. Characterization of the materials by various means shows that oxide nano-particles adhere to the external surface of the zeolite and create a fine permeable coating which does not block the zeolite...
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