Supercharged Low-Temperature Oxygen Storage Capacity of Ceria at the Nanoscale

2013 ◽  
Vol 4 (4) ◽  
pp. 604-608 ◽  
Author(s):  
Jolla Kullgren ◽  
Kersti Hermansson ◽  
Peter Broqvist
Keyword(s):  
Low Temperature ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage

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

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.

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.

Cerium Oxide Nanorods with Unprecedented Low-Temperature Oxygen Storage Capacity

2015 ◽  
Vol 28 (7) ◽  
pp. 1467-1471 ◽  
Author(s):  
Yoshifumi Ishikawa ◽  
Maiki Takeda ◽  
Susumu Tsukimoto ◽  
Koji S. Nakayama ◽  
Naoki Asao
Keyword(s):  
Low Temperature ◽  
Cerium Oxide ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Oxide Nanorods

Rational design of nanostructured, noble metal free, ceria–zirconia catalysts with outstanding low temperature oxygen storage capacity

2013 ◽  
Vol 1 (15) ◽  
pp. 4836 ◽  
Author(s):  
M. Pilar Yeste ◽  
Juan C. Hernández-Garrido ◽  
D. Carolina Arias ◽  
Ginesa Blanco ◽  
José M. Rodríguez-Izquierdo ◽  
...  
Keyword(s):  
Low Temperature ◽  
Noble Metal ◽  
Rational Design ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Metal Free

Autothermal Reforming of Propane Over Ni Catalysts Supported on a Variety of Perovskites

2007 ◽  
Vol 7 (11) ◽  
pp. 4013-4016 ◽  
Author(s):  
SeungSoo Lim ◽  
DongJu Moon ◽  
JongHo Kim ◽  
YoungChul Kim ◽  
NamCook Park ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Storage Capacity ◽  
Flow Reactor ◽  
Oxygen Storage Capacity ◽  
Autothermal Reforming ◽  
Oxygen Storage ◽  
Hydrogen Yield ◽  
Impregnation Method ◽  
Ni Catalysts ◽  
Atmospheric Flow

Autothermal reforming of propane for hydrogen over Ni catalysts supported on a variety of perovskites was performed in an atmospheric flow reactor. Perovskite is known for its higher thermal stability and oxygen storage capacity, but catalytic activity of itself is low. A sites of the ABO3 structured perovskites were occupied by La while B sites by one of Fe, Co, Ni, and Al by citrate method. The composition of the reactant mixture was H2O/C/O2 = 8.96/1.0/1.1. The changes in the states of the catalysts after reaction were analyzed by XRD, TPD, and TGA. Ni/LaAlO3 catalyst maintained the perovskite structure after reaction. It showed higher hydrogen yield and thermal stability compared to those of the catalysts with Fe, Co, or Ni in B sites. Catalysts prepared by deposition-precipitation (DP) method showed higher activity than those prepared by impregnation method, presumably due to the smaller sizes of the NiO crystal particles.

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