Preparation of Cu/La2O3-ZrO2-Al2O3 catalyst and its catalytic properties for selective reduction of NO

Promotion Effects of Metal Oxides on the Ag/Al₂O₃ Catalysts for Selective Catalytic Reduction of NO with C₃H₆

“…The diffraction peaks corresponding to Al 2 O 3 (2θ = 37.5°, 45.8 and 67.1°) are observed in the Ag/Al sample. However, the diffraction peaks of Al 2 O 3 for the AgZr/Al catalyst are much broader and the ZrO 2 diffraction peaks disappeared, suggesting the formation of amorphous ZrO 2 [24] or solid solution between Al 2 O 3 and ZrO 2 [25]. This means that a synergic interaction appears between ZrO 2 promoter and alumina support, which is consistent with the NO-TPD and O 2 -TPD results shown in Fig.…”

Rare‐Earth‐Doped Pt/Ba/Ce0.6Zr0.4O2‐Al2O3 for NOx Storage and Reduction: The Effect of Rare‐Earth Doping on Efficiency and Stability

“…However, rare-earth elements have been widely used as structural or electronic promoters to increase the catalytic activity and thermal stability of the catalysts. [20][21][22][23] ) were synthesized and characterized by XRD, N 2 physisorption, Raman spectroscopy, H 2 temperatureprogrammed reduction, extended X-ray absorption fine structure analysis, scanning transmission electron microscopy, and X-ray photoelectron spectroscopy. The effect of the addition of rare earths on Pt/Ba/RO-CZA was explored, and the relationship between their structures and properties was disclosed.…”

“…Al 2 O 3 contributed to the improvement of the thermal stability, and excellent catalytic activity was observed in the selective reduction of NO with propylene in the presence of excess O 2 . [21] It was also proposed that the addition of La to ceria may not only enhance the oxygen storage capacity but may also increase the stability of the supports and the dispersion of Pt in the supports. [22] As a result, rare-earth elements are promising additives to improve the performance of NSR catalysts.…”