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Issue 29, 2008
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Experimental and modelling study of the recombination reaction H + O2 (+M) → HO2 (+M) between 300 and 900 K, 1.5 and 950 bar, and in the bath gases M = He, Ar, and N2

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Abstract

The recombination reaction H + O2 (+M) → HO2 (+M) was studied by laser flash photolysis in a high pressure flow cell, over the temperature range 300–900 K, the pressure range 1.5–950 bar and in the bath gases M = He and N2. Earlier experiments by Hahn et al. (Phys. Chem. Chem. Phys. 2004, 6, 1997) in the bath gas M = Ar were also extended. The data were analyzed in terms of unimolecular rate theory employing new calculations of relevant molecular parameters. Improved energy transfer parameters for the bath gases M = He, Ar, N2, and H2O could thus be obtained and complete falloff curves were constructed. In the case of water, the high pressure rates well connect with pulse radiolysis results obtained in supercritical water by Janik et al. (J. Phys. Chem. A 2007, 111, 79).

Graphical abstract: Experimental and modelling study of the recombination reaction H + O2 (+M) → HO2 (+M) between 300 and 900 K, 1.5 and 950 bar, and in the bath gases M = He, Ar, and N2

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Publication details

The article was received on 18 Mar 2008, accepted on 25 Apr 2008 and first published on 11 Jun 2008


Article type: Paper
DOI: 10.1039/B804553D
Phys. Chem. Chem. Phys., 2008,10, 4313-4321

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    Experimental and modelling study of the recombination reaction H + O2 (+M) → HO2 (+M) between 300 and 900 K, 1.5 and 950 bar, and in the bath gases M = He, Ar, and N2

    R. X. Fernandes, K. Luther, J. Troe and V. G. Ushakov, Phys. Chem. Chem. Phys., 2008, 10, 4313
    DOI: 10.1039/B804553D

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