Highly Cr-Substituted CeO2 Nanoparticles Synthesized Using a Non-equilibrium Supercritical Hydrothermal Process: High Oxygen Storage Capacity Materials Designed for a Low-Temperature Bitumen Upgrading Process

2020 ◽  
Vol 3 (5) ◽  
pp. 4305-4319 ◽  
Author(s):  
Yuanzheng Zhu ◽  
Gimyeong Seong ◽  
Takio Noguchi ◽  
Akira Yoko ◽  
Takaaki Tomai ◽  
...  
Keyword(s):  
Low Temperature ◽  
Storage Capacity ◽  
Hydrothermal Process ◽  
Oxygen Storage Capacity ◽  
Ceo2 Nanoparticles ◽  
High Oxygen ◽  
Oxygen Storage ◽  
High Oxygen Storage Capacity ◽  
Non Equilibrium

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.

scholarly journals Zr-Ce-Pr-O Mixed Oxide Phases with High Oxygen Storage Capacity (OSC)

2009 ◽  
Vol 73 (4) ◽  
pp. 262-267 ◽  
Author(s):  
Tadatoshi Murota ◽  
Kosuke Sogawa ◽  
Shinya Otsuka-Yao-Matsuo ◽  
Takahisa Omata
Keyword(s):  
Mixed Oxide ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
High Oxygen ◽  
Oxygen Storage ◽  
Oxide Phases ◽  
High Oxygen Storage Capacity

Cu-Doped Zr-Ce-Pr-O Mixed Oxide Phases with High Oxygen Storage Capacity (OSC)

2009 ◽  
Vol 73 (4) ◽  
pp. 268-274 ◽  
Author(s):  
Tadatoshi Murota ◽  
Kosuke Sogawa ◽  
Shinya Otsuka-Yao-Matsuo ◽  
Takahisa Omata
Keyword(s):  
Mixed Oxide ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
High Oxygen ◽  
Oxygen Storage ◽  
Oxide Phases ◽  
High Oxygen Storage Capacity

scholarly journals A Cu-added Zr-Ce-Sn-Pr-O mixed oxide phase with a high oxygen storage capacity

2009 ◽  
Vol 165 ◽  
pp. 012090
Author(s):  
Tadatoshi Murota ◽  
Kosuke Sogawa ◽  
Shinya Otsuka-Yao-Matsuo ◽  
Takahisa Omata
Keyword(s):  
Mixed Oxide ◽  
Storage Capacity ◽  
Oxide Phase ◽  
Oxygen Storage Capacity ◽  
High Oxygen ◽  
Oxygen Storage ◽  
High Oxygen Storage Capacity
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