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- W2044014736 abstract "Nanocomposite systems of ceria nanoparticles and Double Walled Carbon Nanotubes (DWNTs) coated with nano-ceria (n-CeO2) were elaborated using a classical sol gel method. Three samples noted as [n-CeO2 + xDWNTs] with variable weight fractions x = 0, 5 and 15 wt.% of DWNTs were obtained. The samples were characterized by X-ray diffraction and electron microscopy. The electrical conductivity of [n-CeO2 + xDWNTs] compacted pellets systems was determined from electrical impedance spectrometry, under air, between 120 and 400 °C. In this temperature range, all samples were semi-conducting with a weak variation of activation energy. However, the conductivity strongly increased with the weight fraction of ceria coated carbon nanotubes. Finally, the solid–gas interactions between air–CO flows and these systems were studied as a function of time and temperature, by means of Fourier transform infrared (FTIR) spectroscopy. The oxidation kinetics of CO into CO2 was analyzed from the evolutions of FTIR absorption band intensities. As the carbon nanotube fraction x increased, the conversion efficiency was strongly improved." @default.
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- W2044014736 date "2011-06-01" @default.
- W2044014736 modified "2023-10-14" @default.
- W2044014736 title "Electrical properties and reactivity under air–CO flows of composite systems based on ceria coated carbon nanotubes" @default.
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- W2044014736 doi "https://doi.org/10.1016/j.cej.2011.03.079" @default.
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