An investigation of the effect of pre-dosed O atoms on the adsorption of NO on Pt{211}

Mukerji, R J, Bolina, A S and Brown, W A (2003) An investigation of the effect of pre-dosed O atoms on the adsorption of NO on Pt{211}. Surface Science, 547 (1-2). 27 - 44. ISSN 0039-6028

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Abstract

Reflection absorption infrared spectroscopy (RAIRS) and temperature programmed desorption (TPD) have been used to investigate the effect of pre-dosed O atoms on the adsorption of NO on Pt {211} at room temperature. RAIRS experiments show that no new species are formed when NO is adsorbed onto a Pt{2 11} surface that has been pre-dosed with oxygen and no species are lost from the spectra, compared to spectra recorded for NO adsorption on the clean Pt{211} surface. However pre-dosed oxygen atoms do influence the frequency and intensity of several of the observed infrared bands. In stark contrast, pre-dosed O has a large effect on the TPD spectra. In particular N-2 and N2O desorption, seen following NO adsorption on the clean Pt{211} surface, is completely inhibited. This effect has been assigned to the blocking of NO dissociation by the pre-adsorbed O atoms. A new NO desorption peak, not seen for NO adsorption on the clean Pt{211} surface, is also observed in TPD spectra recorded following NO adsorption on an oxygen pre-dosed Pt {211} surface. (C) 2003 Elsevier B.V. All rights reserved.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Subjects: Q Science
Depositing User: Deeptima Massey
Date Deposited: 23 Jul 2014 09:09
Last Modified: 23 Jul 2014 09:09
URI: http://sro.sussex.ac.uk/id/eprint/48688
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