Results 211 to 220 of about 22,217 (245)
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Thermal expansion of Gd-doped ceria and reduced ceria
Solid State Ionics, 2000Abstract The thermal expansion coefficients of CeO 2 and Gd-doped ceria were measured in the range from 100 to 873 K and those of reduced ceria were measured from 100 to 323 K. The thermal expansion coefficient of Ce 1− x Gd x O 2− x /2 became large with increasing the dopant content, x .
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Optical properties of nanocrystalline ceria
Applied Optics, 1997We believe that, for the first time, the UV-visible optical reflectivity of nanocrystalline ceria with various particle sizes has been measured, and their optical absorption characteristics have been studied by Kramers-Kronig transformation. The wide absorption band in the 200-480-nm range consisted of two narrow bands. This wide band was designated as
L, Fangxin +4 more
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Synthesis and catalytic application of ceria nanoparticles and ceria-SiC composites
MRS Proceedings, 2009AbstractThe synthesis of ceria nanoparticles using an inverse microemulsion technique and precipitation method was investigated. Ceria nanoparticles were synthesized by adding diluted ammonia to a microemulsion consisting of n-heptane, Marlophen NP5 and cerium nitrate.
Christian Schrage +2 more
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Journal of Colloid and Interface Science, 2005
Composite ceria/silica materials of 10 and 20% (w/w) were prepared by calcination, at 650 degrees C for 3 h, of the xerogels obtained by mixing the corresponding amount of a ceria precursor with freshly prepared sols of spherical silica particles (Stober particles) in their mother liquors.
Kamal M S, Khalil +2 more
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Composite ceria/silica materials of 10 and 20% (w/w) were prepared by calcination, at 650 degrees C for 3 h, of the xerogels obtained by mixing the corresponding amount of a ceria precursor with freshly prepared sols of spherical silica particles (Stober particles) in their mother liquors.
Kamal M S, Khalil +2 more
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Oxygen vacancy migration in ceria and Pr-doped ceria: A DFT+U study
The Journal of Chemical Physics, 2010Oxygen vacancy formation and migration in ceria (CeO2) is central to its performance as an ionic conductor. It has been observed that ceria doped with suitable aliovalent cationic dopants improves its ionic conductivity. To investigate this phenomenon, we present total energy calculations within the framework of density functional theory to study ...
Pratik P, Dholabhai +3 more
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Effect of Ceria Structure on Oxygen Migration for Rh/Ceria Catalysts
The Journal of Physical Chemistry, 1996The adsorption and reaction properties of Rh particles supported on a CeO2(100) surface and on polycrystalline CeO2 films annealed at low (LT, 970 K) and high (HT, 1720 K) temperatures were studied using temperature-programmed desorption (TPD) and steady-state, CO oxidation kinetics.
H. Cordatos +4 more
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Nonstoichiometry and Diffusion in Ceria and Ceria Solid Solutions
Key Engineering Materials, 2003Y. Ikuma, Michiyo Kamiya, Eriko Shimada
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Diesel soot combustion ceria catalysts
Applied Catalysis B: Environmental, 2014Agustin Bueno-Lopez
exaly
A comparative study of water-gas-shift reaction over ceria supported metallic catalysts
Applied Catalysis A: General, 2001R J Gorte
exaly