Open Archive Toulouse Archive Ouverte (oatao) Electrical Properties and Reactivity under Air–co Flows of Composite Systems Based on Ceria Coated Carbon Nanotubes
نویسنده
چکیده
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 15wt.% of DWNTs were obtained. The samples were characterized by X-ray diffraction and electron microscopy. The electrical conductivity of [n-CeO2 + xDWNTs] compacted pellets systemswas determined fromelectrical 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
منابع مشابه
Archive Toulouse Archive
To cite this version: Simon, Patrice and Gogotsi, Yury Charge storage mechanism in nanoporous carbons and its consequence for electrical double layer capacitors. (2010) Philosophical Transactions A: Mathematical, Physical and Engineering Sciences, vol. 368 (n° 1923). pp. 3457-3467. ISSN 1364-503X Open Archive Toulouse Archive Ouverte (OATAO) OATAO is an open access repository that collects the ...
متن کاملOpen Archive Toulouse Archive Ouverte (oatao) Interaction and Coalescence of Large Bubbles Rising in a Thin Gap
To cite this version: Huisman, Sander and Ern, Patricia and Roig, Véronique Interaction and coalescence of large bubbles rising in a thin gap. (2012) PHYSICAL REVIEW E, vol. 85 (n° 2). pp. 027302-1-027302-4. ISSN 1550-2376 Open Archive Toulouse Archive Ouverte (OATAO) OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web whe...
متن کاملArchive TOULOUSE Archive Ouverte ( OATAO )
To cite this version : Souchier, Emeline and Besland, Marie-Paule and Tranchant, Julien and Corraze, Benoit and Moreau, Philippe and Retoux, Richard and Estournès, Claude and Mazoyer, Pascale and Cario, Laurent and Janod, Etienne Deposition by radio frequency magnetron sputtering of GaV4S8 thin films for resistive random access memory application. (2013) Thin Solid Films, vol. 533 . pp. 54-60. ...
متن کامل