A low-temperature method for measuring oxygen storage capacity of ceria-containing oxides

2016 ◽  
Vol 6 (15) ◽  
pp. 5891-5898 ◽  
Author(s):  
A. V. Porsin ◽  
E. A. Alikin ◽  
V. I. Bukhtiyarov
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Temperature Method ◽  
P Addition

Addition of Pt/Al2O3 to a ceria-containing oxide allows studying oxygen storage capacity at lower temperatures. The advantage is achieved through separation of functions of oxygen storage/release and CO oxidation.

Extra-Low-Temperature Oxygen Storage Capacity of CeO2Nanocrystals with Cubic Facets

Nano Letters ◽  
2011 ◽  
Vol 11 (2) ◽  
pp. 361-364 ◽  
Author(s):  
Jing Zhang ◽  
Hitoshi Kumagai ◽  
Kae Yamamura ◽  
Satoshi Ohara ◽  
Seiichi Takami ◽  
...  
Keyword(s):  
Low Temperature ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage

CO Oxidation over Pd Catalysts Supported on Different Supports: A Consideration of Oxygen Storage Capacity of Catalyst

2011 ◽  
Vol 347-353 ◽  
pp. 3298-3301
Author(s):  
Ye Xu ◽  
Jin Qiang Ma ◽  
Yuan Feng Xu ◽  
Hui Li ◽  
He Xing Li ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
X Ray Diffraction ◽  
Pd Catalysts ◽  
Transmission Electron ◽  
Pulse Experiment ◽  
Temperature Programmed

A series of Pd catalysts supported on different materials (SiO2, γ-Al2O3, CeO2, TiO2) were synthesized through precipitation reduction of palladium ions with H2. They exhibited different activity during catalytic oxidation of CO to CO2. With the characterization of N2 physisorption experiment, X-ray diffraction, transmission electron microscopy, temperature-programmed reduction, and CO and O2 multi-pulse experiment, the correlation of catalytic activity and oxygen storage capacity (OSC) of catalyst has been investigated. It was found that the reactivity is largely controlled by the OSC of the catalysts, and thus Pd/CeO2 and Pd/TiO2 were more active than Pd/SiO2 and Pd/Al2O3 for CO oxidation.

scholarly journals Synthesis of Ceria Zirconia Oxides using Solvothermal Treatment

2018 ◽  
Vol 156 ◽  
pp. 05014 ◽  
Author(s):  
Siti Machmudah ◽  
Widiyastuti ◽  
Sugeng Winardi ◽  
Wahyudiono ◽  
Hideki Kanda ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ethylene Glycol ◽  
Solvothermal Synthesis ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Electrochemical Analysis ◽  
High Oxygen ◽  
Oxygen Storage ◽  
Solvothermal Treatment ◽  
High Oxygen Storage Capacity

Ceria oxide (CeO2) is widely used as catalyst with high oxygen storage capacity at low temperature. The addition of zirconia oxide (ZrO2) to CeO2 can enhance oxygen storage capacity as well as thermal stability. In this work, ceria zirconia oxides has been synthesized via a low temperature solvothermal treatment in order to produce ceria zirconia oxides composite with high oxygen storage capacity as electrolyte of solid oxide fuel cells (SOFC). Under solvothermal conditions, solvent may control the direction of crystal growth, morphology, particle size and size distribution, because of the controllability of thermodynamics and transport properties by pressure and temperature. Water, mixed of water and ethanol (70/30 vol/vol), and mixed of water and ethylene glycol (70/30 vol/vol) were used as solvent, while Ce(NO3)3 and ZrO(NO3)2 with 0.06 M concentration were used as precursor. The experiments were conducted at temperature of 150 °C and pressure for 2 h in a Teflon-lined autoclave of 100 mL volume. The synthesized products were dried at 60 °C for 6 and 12 h and then calcined at 900 °C for 6 h. The particle products were characterized using SEM, XRD, TG/DTA, and Potentiostat. The results showed that the morphology of particles formed were affected by the solvent. Solid plate shaped particles were produced in water, and tend to be pore with the addition of ethylene glycol. The addition of ethanol decreased the size of particles with sphere shaped. The XRD pattern indicated that ceria-zirconia oxides particles are uniformly distributed in the structure to form a homogeneous solid solution. Based on the electrochemical analysis, ceria zirconia oxides produced via solvothermal synthesis had high conductivity ion of 0.5594 S/cm, which is higher than minimum conductivity ion requirement of 0.01 S/cm for SOFC electrolyte. It indicated that ceria zirconia oxides produced via solvothermal synthesis is suitable for SOFC electrolyte.

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