Study of effect of preparation method and composition on the catalytic properties of complex oxides (Gd,Sr) n + 1Fe n O3n + 1 for dry reforming of methane
| Autor: | I. A. Khayrullina, T. F. Sheshko, Yu. M. Serov, L. V. Yafarova, I. V. Chislova, Irina A. Zvereva, T. A. Kryuchkova |
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| Rok vydání: | 2017 |
| Předmět: |
inorganic chemicals
Strontium Materials science Carbon dioxide reforming Gadolinium Inorganic chemistry General Engineering chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Nanocrystalline material 0104 chemical sciences Catalysis chemistry visual_art visual_art.visual_art_medium Ferrite (magnet) General Materials Science Ceramic 0210 nano-technology Chemical composition |
| Zdroj: | Nanotechnologies in Russia. 12:174-184 |
| ISSN: | 1995-0799 1995-0780 |
| DOI: | 10.1134/s1995078017020112 |
| Popis: | The catalytic activity of nanostructured perovskite-type ferrites of gadolinium and strontium, has been studied. The intercorrelation between the catalytic activity and the method used to obtain ferrites has been shown: the products formation rates are higher in the samples obtained by a ceramic technology, while the sol-gel method makes it possible to obtain ferrites with a greater hydrogen selectivity, which is accounted for by their nanocrystalline state and porous structure. It is shown that the specific catalytic activity of the catalysts, which are prepared by the same method and are of approximately the same chemical composition, is constant. It is shown that a nonisovalent replacement of gadolinium by strontium causes symmetry lowering in the perovskite structure and the appearance of a heterovalent state of iron atoms, which affects ferrite catalytic activity. |
| Databáze: | OpenAIRE |
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