Type:
Journal
Description:
Ceria–zirconia solid solution nanocrystals, (1‐x)CeO2–xZrO2, 0 ≤ x ≤ 1, are prepared by sol–gel processing in dodecylamine of solutions obtained by forced hydrolysis of inorganic salts. The as‐prepared nanoparticles have a ceria cubic structure, up to x = 0.35, or are amorphous. Heat‐treatment is carried out at temperatures ranging from 500 to 800 °C, the latter temperature begin suitable to obtain solid solutions throughout the composition range. For all the heating temperatures and x values, the fluorite cubic structure of pure CeO2 transforms to a mixture (c′) of the cubic c and tetragonal t″ phases for x = 0.35, and to tetragonal t phase only for x = 0.8 at 650 °C, x = 0.65 at 800 °C, and, to a very limited extent, x = 0.5 at 1000 °C. No evidence is obtained at low x values of the t phase, which is detrimental to the oxygen storage capacity. Prolonged heating at 1000 °C demonstrates that only for x = 0.65 a limited …
Publisher:
WILEY‐VCH Verlag
Publication date:
10 Jul 2012
Biblio References:
Volume: 22 Issue: 13 Pages: 2867-2875
Origin:
Advanced Functional Materials