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- W2889764721 abstract "Abstract A novel catalytic system combining oxidation catalyst with electric field was applied for low-temperature CH4 oxidation at low CH4 concentration (0.2% CH4). Compared with conventional catalytic process, significant improvement in activity was observed over PdCeZrOx catalyst in electric field. For example, the light-off temperature (T50) of CH4 (0.2% CH4) of 1 wt % PdCe0.75Zr0.25Ox catalyst was approximately 255 °C in an electric field with 3 mA electric current. The impact of electric field in CH4 oxidation over PdCeZrOx catalyst was thoroughly investigated. The XRD and XPS results revealed that electric field provided free electrons that facilitated the release of lattice oxygen in the ceria-zirconia solid solution, therefore reinforced Pd0 oxidation and the formation of palladium oxide (PdOx, x > 0) on catalyst surface. Electric field also enhanced the reducibility of the PdOx, which provided active oxygen for CH4 oxidation at low temperature. With in-situ FTIR technique, it was found that electric field greatly promotes the chemisorption and dehydrogenation of CH4, thereby accelerates the chemical reactions of the intermediate products, so as to promotes CH4 oxidation. The mechanism of catalytic oxidation of CH4 in electric field was proposed based on comprehensive investigations above." @default.
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- W2889764721 date "2018-11-01" @default.
- W2889764721 modified "2023-10-18" @default.
- W2889764721 title "Electric field promoted ultra-lean methane oxidation over Pd-Ce-Zr catalysts at low temperature" @default.
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- W2889764721 doi "https://doi.org/10.1016/j.mcat.2018.08.021" @default.
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