3D hierarchically structured Ce1-xGdxO2-x/2 mixed oxide particles: the role of microstructure, porosity and multi-level architecture stability in soot and propane oxidation.

Hierarchical Au/CeO2systems – influence of Ln3+dopants on the catalytic activity in the propane oxidation process

“…As noted, the percentage of the unwanted co-product in the final gas mixture increases with increasing temperature. A similar result was obtained by Woźniak et al 67 for hierarchical, star-like (macroparticles) ceria-based catalysts. This observation is consistent with the data presented in ref.…”

“…The obtained SAED patterns were characteristic of polycrystalline samples (ring-type). However, Woźniak et al 31,67 reported that the SAED patterns and FFT images indicated almost the same orientation of the Ce 1− x Ln x O 2− x /2 nanocrystals within a single star-like macroparticle arm (pseudo point-type; mosaic arrangement). Such a difference could be due to the completely different way of synthesizing hierarchical macroparticles, in ref.…”

“…Such a difference could be due to the completely different way of synthesizing hierarchical macroparticles, in ref. 31 and 67 – oxidative thermolysis of Ce- or Ce/Ln-formate and in this work – wet chemical method.…”

“…[63][64][65][66] In the case of the Ce 1−x Ln x O 2−x/2 macroparticles, literature reports are much less numerous. 30,67 In our previous paper, 30 the synthesis procedure and characteristics of the hierarchical, tube-like Ce 1−x Yb x O 2−x/2 macroparticles (x = 0.1; 0.2; 0.3; 0.4 and 0.5) have been thoroughly described. In this work, a series of hierarchical, tube-like Ce 0.9 Ln 0.1 O 1.95 (where Ln = La, Gd, Yb) mixed oxides were obtained.…”

Confinement of nano-gold in 3D hierarchically structured gadolinium-doped ceria mesocrystal: synergistic effect of chemical composition and structural hierarchy in CO and propane oxidation

“…The synthetic steps were described in detail in our previous work. 51 The mixed oxide Ce 1−x Gd x O 2−x/2 (x = 0; 0.1) nanocubes (cubes) were prepared via the hydrothermal technique. 52 A mixture of CeIJNO 3 ) 3 •6H 2 O and GdIJNO 3 ) 3 •6H 2 O, with a suitable Ce : Gd ratio, was dissolved in distilled water.…”