Research output: Contribution to journal › Article › peer-review
The interaction of γ-Al2O3, taken as a model substance of tropospheric mineral dust, with N2O, NO and NO2 has been studied using kinetic and temperature-programmed desorption (TPD) mass-spectrometry in presence and absence of UV irradiation. At low surface coverages (<0.001 ML), adsorption of N2O and NO2 is accompanied by dissociation and chemiluminescence, whereas adsorption of NO does not lead to appreciable dissociation. Upon UV irradiation of Al2O3 in a flow of N2O, photoinduced decomposition and desorption of N2O take place, whereas in a flow of NO, only photoinduced desorption is observed. Dark dissociative adsorption of N2O and NO and photoinduced N2O dissociation apparently occur by a mechanism involving electron capture from surface F- and F+-centers. Photoinduced desorption of N2O and NO may be associated with decomposition of complexes of these molecules with Lewis acid sites, V-centers or OH-groups. TPD of N2O and NO proceeds predominantly without decomposition, while NO2 partially decomposes to NO and O2.
Original language | English |
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Pages (from-to) | 247-251 |
Number of pages | 5 |
Journal | Catalysis Today |
Volume | 119 |
Issue number | 1-4 |
DOIs | |
State | Published - 15 Jan 2007 |
Event | Air Pollution Abatement Catalysis Symposium (APAC) - Cracow, Poland Duration: 21 Sep 2005 → 24 Sep 2005 |
ID: 5463973