Results 171 to 180 of about 5,753 (214)
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Redox behavior of gold supported on ceria and ceria-zirconia based catalysts
Journal of Rare Earths, 2009Abstract A series of gold-based catalysts were prepared by deposition precipitation or incipient wetness impregnation on Ce x Z 1– x O 2 solid solutions (0.28≤ x ≤1.00). The morphological and structural characterization of these catalysts were carried out with X-ray diffraction, transmission electron microscopy (TEM) analysis and physical ...
VICARIO, Michela +4 more
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Engineering the Bioactivity of Flame-Made Ceria and Ceria/Bioglass Hybrid Nanoparticles
ACS Applied Materials & Interfaces, 2018Despite its use as a highly efficient and reusable catalyst in research and industrial settings, cerium oxide nanoparticles or nanoceria have yet to gain a foothold in the biomedical field. A variety of beneficial effects of nanoceria have been demonstrated, including its use as an inorganic nanoenzyme to mimic antioxidant enzymes, to protect mammalian
Martin T. Matter +5 more
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Statistical thermodynamics of non-stoichiometric ceria and ceria zirconia solid solutions
Physical Chemistry Chemical Physics, 2016The statistical mechanics of lattice configurations are used to develop an analytical model of non-stoichiometry in ceria and ceria zirconia.
Bulfin, Brendan +7 more
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Journal of Catalysis, 2018
Abstract Toluene oxidation on three ceria catalysts, CeO2, VOx/CeO2 and Au/CeO2, was investigated by an operando Raman-online FTIR reactor cell. The reactive surface oxygen sites were preferred sites for vanadium and gold deposition. The deposited vanadium existed as V5+, while most of the gold was in Au+ state and roughly a third of ceria was in the
Wang, Qingyue CBME +2 more
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Abstract Toluene oxidation on three ceria catalysts, CeO2, VOx/CeO2 and Au/CeO2, was investigated by an operando Raman-online FTIR reactor cell. The reactive surface oxygen sites were preferred sites for vanadium and gold deposition. The deposited vanadium existed as V5+, while most of the gold was in Au+ state and roughly a third of ceria was in the
Wang, Qingyue CBME +2 more
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Defect Chemistry of Ceria Nanorods
The Journal of Physical Chemistry C, 2014Ceria nanorods were investigated using in-situ Raman and FTIR spectroscopy for CO adsorption and subsequent reaction with water at 200 °C and 350 °C. The involvement of defects in ceria nanorods during CO adsorption and reaction with H2O is dependent on the temperature.
Agarwal, Shilpa +4 more
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Ceria‐ and Cu‐Doped Ceria Nanocrystals Synthesized by the Hydrothermal Methods
Journal of the American Ceramic Society, 2008Ceria‐ or Cu‐doped ceria nanocrystals with a uniform diameter of about 4–5 nm have been successfully synthesized directly via a hydrothermal treatment of the precipitate Ce(OH) 3 (purple) or Cu‐doped Ce(OH) 3 in a strongly
Jiacheng Wang, Qingfeng Liu, Qian Liu
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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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Steam reforming of methanol over ceria and gold-ceria nanoshapes
Applied Catalysis B: Environmental, 2010In this work we have found that a small amount (∼1 at.%) of gold deposited on ceria nanorods exhibits excellent catalytic activity for the low-temperature steam reforming of methanol (SRM). Gold clusters (
Nan Yi +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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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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