Gd-Bi-M-Ce-O (M = Cu, Zr, Ni, Co, Mn) ceria-based solid solutions for low temperature CO oxidation
| Autor: | Ekaterina A. Obraztsova, Anatoly A. Konovalov, Vladimir G. Leontiev, Alexey V. Bykov, Alexander V. Naumkin, Ivan V. Shelepin, Igor V. Zagaynov |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Dopant Process Chemistry and Technology 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention symbols.namesake X-ray photoelectron spectroscopy law 0103 physical sciences Materials Chemistry Ceramics and Composites symbols Calcination Particle size Fourier transform infrared spectroscopy 0210 nano-technology Raman spectroscopy Mesoporous material Solid solution Nuclear chemistry |
| Zdroj: | Ceramics International. 47:8142-8149 |
| ISSN: | 0272-8842 |
| Popis: | Ceria based solid solutions doped by Gd, Bi, and the third dopant were synthesized by the co-precipitation method with ultrasonic treatment, followed by calcination at the temperature of 500°С. Characterization of the synthesized nanosystems by XRD, TEM, TG, Raman spectroscopy, FTIR, XPS was carried out. It is shown that all obtained powders of solid solutions crystallized into a cubic structure of the fluorite type, with an average particle size of 5–15 nm. The samples had a mesoporous structure of the pore diameter of 2–5 nm. The catalytic activity of Gd-Bi-M-Ce-O (M = Cu, Zr, Ni, Co, Mn) solid solutions was carried out. The catalyst Gd0.05Bi0.15Mn0.20Ce0.60O2 has the lowest oxidation temperature. |
| Databáze: | OpenAIRE |
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