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- W2018465320 abstract "Abstract A series of Li-based lean-burn NO x trap (LNT) catalysts Pt/Li/TiO 2 –MO x (M = Al, Zr, Si, Sn) were prepared by sequential impregnation with the supports TiO 2 –MO x synthesized by co-precipitation. The support effect on the NO x storage and sulfur-resisting performance of Pt/Li/TiO 2 –MO x catalysts was investigated carefully. The NO x storage capacity of fresh Pt/Li/TiO 2 is greatly improved by doping with Al 2 O 3 or ZrO 2 due to the remarkably increased specific surface area and the oxidation ability of the catalysts. HR-TEM and H 2 -chemisorption results reveal that the oxidation ability of Pt/Li/TiO 2 –MO x is mainly determined by Pt crystallite size. Larger Pt crystallites correspond to stronger oxidation ability. The regeneration of sulfated Pt/Li/TiO 2 –MO x strongly depends on the total acidity of the supports, including Bronsted and Lewis acid; the supports with larger acidity possess higher ability of sulfur-resistance and regeneration. The results of in situ DRIFTS show that over Pt/Li/TiO 2 –MO x (M = Al, Zr, Si, Sn) NO x is mainly stored as ionic nitrate species at 350 °C. Taking the NSC and regeneration ability into account, the catalyst Pt/Li/TiO 2 –Al 2 O 3 is the most promising one for practical application." @default.
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- W2018465320 date "2011-10-01" @default.
- W2018465320 modified "2023-09-30" @default.
- W2018465320 title "Support effect on the NOx storage and sulfur-resisting performance of the NOx trap catalysts Pt/Li/TiO2–MOx (M=Al, Zr, Si, Sn)" @default.
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- W2018465320 doi "https://doi.org/10.1016/j.cattod.2011.02.051" @default.
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