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Adsorption of nitric oxide and temperature programmed desorption on nonstoichiometric nickel-copper manganites

Drouet, Christophe and Alphonse, Pierre and Fierro, José Luis García and Rousset, Abel Adsorption of nitric oxide and temperature programmed desorption on nonstoichiometric nickel-copper manganites. (2001) Applied Surface Science, 174 (3-4). 289-295. ISSN 0169-4332

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Official URL: http://dx.doi.org/10.1016/S0169-4332(01)00180-5

Abstract

The interaction of nitric oxide with nonstoichiometric nickel–copper manganites has been investigated by adsorption and temperature programmed desorption (TPD) experiments. Nitric oxide was found to adsorb molecularly at room temperature on such oxides. Reversibly and irreversibly adsorbed NO molecules were evidenced. The amount of reversibly and irreversibly adsorbed NO increased with the nickel content but decreased with the copper one. Moreover, the ratio reversible/irreversible increased with the copper content of the oxides. TPD experiments indicated that adsorbed NO desorbs at low temperature (below 200°C) mainly as NO molecules (70–90%). The balance consists of N2O, a part of which desorbs below 200°C and the rest above 250°C. The area of the peak corresponding to the desorption of nitrous oxide at high temperature is far much larger for copper-free oxides.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Applied Surface Science website : http://www.sciencedirect.com/science/article/pii/S0169433201001805
HAL Id:hal-01003971
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Consejo Superior de Investigaciones Científicas - CSIC (SPAIN)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: Christophe DROUET
Deposited On:05 Jun 2014 12:15

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