Results 131 to 140 of about 1,161 (179)

Ceria−Zirconia High-Temperature Desulfurization Sorbents

Industrial & Engineering Chemistry Research, 2005
Ceria and ceria−zirconia desulfurization sorbents containing up to 20 mol % ZrO2 were prepared using a coprecipitation method. XRD analysis indicated the formation of solid solutions of ZrO2 in CeO2. ZrO2 addition produced larger specific surface area, improved sintering resistance, and increased the reducibility of the ceria.
Kwang Bok Yi, Elizabeth J. Podlaha, Douglas P. Harrison   +2 more
openaire   +1 more source

Ceria-zirconia Nanocatalysts for Diesel Soot Combustion

SAE Technical Paper Series, 2015
<div class="section abstract"><div class="htmlview paragraph">A set of ceria-zirconia nanocatalysts with different Zr-contents and structural properties was prepared to study the effect of both the Zr-amount and surface-dependent activity towards soot combustion in “loose” and “tight” soot-catalyst contact.
PIUMETTI, MARCO, BENSAID, SAMIR, RUSSO, Nunzio   +2 more
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Flame synthesis of nanocrystalline ceria–zirconia: effect of carrier liquid

Chemical Communications, 2003
Spraying cerium and zirconium precursors dissolved in carboxylic acids into a methane-oxygen flame resulted in well-structured nanocrystals of ceria-zirconia mixed oxides with high temperature stability and surface area.
Stark WJ, Mädler L, Maciejewski M, Pratsinis SE, Baiker A   +4 more
openaire   +3 more sources

Microstructural investigation of ceria-zirconia solid solution with oxygen vacancies

Journal of Electron Microscopy, 2003
The microstructural change in CeO2-ZrO2 solid solution (Ce2Zr2O7 + x; 0 < or = x < or = 1) with an ordered arrangement of Ce and Zr associated with the absorption/release of oxygen was observed by transmission electron microscopy (TEM). The oxidation of Ce2Zr2O7 was observed in TEM by electron diffraction analysis.
Tsuyoshi, Sasaki, Yoshio, Ukyo, Kotaro, Kuroda, Shigeo, Arai, Hiroyasu, Saka   +4 more
openaire   +2 more sources

Thermal evolution of ceria-zirconia metallorganic precursors

Thermochimica Acta, 1982
Abstract Ceria-zirconia tetragonal solid solutions were obtained by using gelled metallorganic precursors as starting materials. By drying these gels, intimately mixed powders of a quasi-amorphous nature were obtained. On firing, the tetragonal solid solution sintered directly without any separation of the single oxides.
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Preparation and characterization of ceria‐zirconia composite for enrichment and identification of phosphopeptides

Journal of Separation Science, 2010
AbstractCeria‐zirconia composites at different molar ratios were synthesized. Several methods were used to characterize these composites, including X‐ray photoelectron spectroscopy, surface area and surface acid‐base property detection. A one‐step method for isolation and identification of phosphopeptides from peptide mixture was created using these ...
Jian-Hong, Wu, Kuang, Xiao, Yong, Zhao, Wei-Ping, Zhang, Lin, Guo, Yu-Qi, Feng   +5 more
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Advanced Electron Microscopy Investigation of Ceria–Zirconia‐Based Catalysts

ChemCatChem, 2010
AbstractThe potentials of advanced transmission and scanning transmission electron microscopy in nanostructural studies of ceria–zirconia mixed oxides are overviewed. The crystallographic criteria that allow us to discriminate the different CeO2–ZrO2 polymorphs and the nanocrystal size range within which they can be applied are discussed.
M. López‐Haro, J. A. Pérez‐Omil, J. C. Hernández‐Garrido, S. Trasobares, A. B. Hungría, J. M. Cíes, P. A. Midgley, P. Bayle‐Guillemaud, A. Martínez‐Arias, S. Bernal, J. J. Delgado, J. J. Calvino   +11 more
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Nanoscale Heterogeneity in Ceria Zirconia with Low-Temperature Redox Properties

The Journal of Physical Chemistry B, 2006
We have investigated nanoscale compositional and structural variations in Ce(0.5)Zr(0.5)O(2) samples with different redox properties. Different samples were prepared using a spray freezing technique, and the synthesis conditions were varied to yield materials with reduction temperatures in the range of 400-750 degrees C.
Ruigang, Wang, Peter A, Crozier, Renu, Sharma, James B, Adams   +3 more
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STRUCTURAL PROPERTIES AND THERMAL STABILITY OF CERIA-ZIRCONIA AND RELATED MATERIALS

2002
The use of CeO2-based materials in catalysis has attracted considerable attention in recent years, particularly in applications like environmental catalysis, where ceria has shown great potential. This book critically reviews the most recent advances in the field, with the focus on both fundamental and applied issues.
KASPAR, JAN, FORNASIERO, Paolo
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Oxygen Storage Behavior of Ceria–Zirconia-Based Catalysts in the Presence of SO2

Topics in Catalysis, 2001
This paper investigates the effect of the presence of SO2 in the dynamics of oxygen storage on ceria and ceria–zirconia.
BOARO, Marta, DE LEITENBURG, Carla, DOLCETTI, Giuliano, TROVARELLI, Alessandro, Graziani M.   +4 more
openaire   +2 more sources