Structural Consideration with Respect to the Thermal Stability of a New Platinum Suppported Lanthanum-Alumina Catalyst

Thermal Stabilization of CexZr1-xO2Oxygen Storage Promoters by Addition of Al2O3: Effect of Thermal Aging on Textural, Structural, and Morphological Properties

“…The situation appears more complex for CeO 2 ; in fact some contradictory results have been found as far as textural and structural stabilization of Al 2 O 3 by addition of CeO 2 are concerned. − At low contents of the impregnated CeO 2 , a strong interaction between CeO 2 and Al 2 O 3 occurs leading to significant formation of Ce 3+ species that easily interact at high temperatures, particularly under reducing conditions, leading to formation of patches of CeAlO 3 . This provides an effective way to prevent support sintering attributed to interfacial structural coherence of CeAlO 3 with alumina. , Consistently, under oxidizing conditions the stabilizing effect of CeO 2 is less effective, particularly at high loading 1 Experimental Pattern for Thermal Transformation of the Starting γ-Al 2 O 3 …”

Effect of sintering atmosphere on the pore-structure stability of cerium-doped nanostructured alumina

“…One of the major difficulties in using porous nanostructured ceramics is their inherent tendency for surface area and porosity reduction. There is a large volume of literature available on the pore-structure stability of porous alumina [16][17][18][19][20][21][22][23][24][25]. It has been noted by many investigators that, in the case of transition aluminas, there is a considerable reduction in surface area during the transformation to ,,-alumina [18,24].…”

“…It has been noted by many investigators that, in the case of transition aluminas, there is a considerable reduction in surface area during the transformation to ,,-alumina [18,24]. The rate of reduction in surface area can be retarded by suitable doping [16][17][18][19][20][21][22][23][24]. However, the actual mechanism of retardation is not clear yet [16][17][18][19][20][21][22][23][24].…”

“…The rate of reduction in surface area can be retarded by suitable doping [16][17][18][19][20][21][22][23][24]. However, the actual mechanism of retardation is not clear yet [16][17][18][19][20][21][22][23][24]. Ba and rare earth cations are the most studied dopants and their behaviours at high temperatures vary from one another [16][17][18][19][20][21][22][23][24].…”

“…However, the actual mechanism of retardation is not clear yet [16][17][18][19][20][21][22][23][24]. Ba and rare earth cations are the most studied dopants and their behaviours at high temperatures vary from one another [16][17][18][19][20][21][22][23][24]. Kato et al have attributed the stability of lanthanide-doped alumina to the formation of /~-alumina type of structures [24].…”