Series of Gd 3+ and Mg 2+ co-doped ceria (Ce 0.8 Gd 0.2-x Mg x O 1.9-δ ) powders were prepared by a sol-gel method and electrolyte ceramics were obtained by sintering at 1300°C. Thermogravimetric and differential scanning calorimetry, X-ray diffraction, scanning electron microscope and electrochemical impedance spectroscopy were used for structural, morphology and electrical characterization of the prepared samples. Well crystalline cubic fluorite structured composite was confirmed after calcination at 700°C and the electrolyte ceramics sintered at 1300°C for 4 h was quite dense with uniform microstructure. The electrochemical analysis results displayed that the highest conductivity has the Ce 0.8 Gd 0.14 Mg 0.06 O 1.87 compound, i.e. 0.0203 S/cm at 800°C. Therefore, it was concluded that co-doping with Gd 3+ and Mg 2+ could enhance the electrical properties of the CeO 2 based solid electrolytes.
The simultaneous achievement for large surface areas and high IL contents in porous materials are highly beneficial to efficient carbon dioxide (CO2) capture and atmospheric fixation. Herein, a serials of...
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