Issue 12, 2000
From the journal:

Physical Chemistry Chemical Physics

Species formed after NO adsorption and NO+O2 co-adsorption on TiO2: an FTIR spectroscopic study

Konstantin Hadjiivanov*a  and  Helmut Knözingerb  

* Corresponding authors

a Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria

b Department Chemie, Physikalische Chemie, Uniersität München, Butenandtstrasse 5-13 (Haus E), München, Germany

Abstract

Adsorption of NO and its co-adsorption with oxygen on TiO2 (Degussa P-25) were studied by FTIR spectroscopy. It was found that NO adsorption results in its disproportionation to NO− (1170 cm−1), N2O22− (1335 cm−1) and nitrates (1650–1550 and 1240–1220 cm−1). The nitrate bands develop with time and coordinated NO (ca. 1900 cm−1) is formed. Addition of oxygen to NO results in a strong increase in concentration of the nitrates and formation of NO+ (2206 cm−1). In addition, species assigned to nitrocomplexes (1520 and 1284 cm−1) are found. The stability and reactivity of the different surface compounds as well as their interconversion are studied and discussed.

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Article information

DOI
https://doi.org/10.1039/B002065F
Article type
Paper
Submitted
14 Mar 2000
Accepted
25 Apr 2000
First published
24 May 2000

Phys. Chem. Chem. Phys., 2000,2, 2803-2806

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Species formed after NO adsorption and NO+O2 co-adsorption on TiO2: an FTIR spectroscopic study

K. Hadjiivanov and H. Knözinger, Phys. Chem. Chem. Phys., 2000, 2, 2803 DOI: 10.1039/B002065F

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