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The support ZrTiO 4 and the lean-burn NOx trap (LNT) catalyst K/LaCoO 3 /ZrTiO 4 were prepared by co-precipitation and successive impregnation, respectively. This catalyst exhibits much better NOx storage performance than the conventional Pt-containing catalyst K/Pt/ZrTiO 4 . Compared with Pt, the perovskite LaCoO 3 possesses higher capability for NO to NO ...
The complex oxide Ba-Fe-O catalysts were prepared by sol-gel method. The XRD, DTA, NO-TPD, XPS and NSC measurements were used to characterize the structures, NO x storage property and sulfur resistance ability. It is concluded that when coadsorption of NO and O 2 at 400 o C, the sample calcined at 750 o C possesses high NO x storage capacity and sulfur resistance...
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