A facile synthesis of CuCe and CuCeFe mixed-oxide catalysts by solution combustion method for catalytic methane combustion
| Autor: | P Kruemek, S Mattathankul, Nutchapon Chotigkrai, N Triamnak |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
chemistry.chemical_element Catalytic combustion 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Oxygen Methane 0104 chemical sciences Catalysis Metal chemistry.chemical_compound Chemical engineering chemistry visual_art Phase (matter) visual_art.visual_art_medium Mixed oxide 0210 nano-technology Solid solution |
| Zdroj: | IOP Conference Series: Materials Science and Engineering. 778:012061 |
| ISSN: | 1757-899X 1757-8981 |
| DOI: | 10.1088/1757-899x/778/1/012061 |
| Popis: | In this research, the solution combustion method was used to synthesize non-noble catalysts including copper-cerium (CuCe) and copper-cerium-iron (CuCeFe) mixed-oxides for catalytic combustion of methane. The effects of Cu contents (5, 10 and 15 wt%) and Fe addition were investigated. The synthesized catalysts were characterized by XRD, N2-physisorption, and H2-TPR. The results showed that increasing Cu content exceeds 10 wt% for a series of CuCe catalyst, leading to a collapse textural structure and formation of larger CuO phase. It resulted in the substantial drop of the catalytic activity for methane combustion. Furthermore, incorporation of Fe into Cu-Ce mixed oxides causes the formation of Fe2O3 and Ce-Fe-O solid solution, stabilizing the textural properties, enhancing the oxygen vacancies and oxygen mobility. The superior catalyst was 15CuCeFe because it revealed the highest methane conversion at 500 °C and relatively high conversion at a lower temperature. It can be seen that solution combustion is a facile method to prepare the mixed-oxide catalysts and incorporating the metal promoters. The Cu, Ce and Fe metals play a significant role in catalytic methane combustion not only enhancing reactants (methane and oxygen) activation but also improving the physical properties. |
| Databáze: | OpenAIRE |
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