Experimental and Theoretical Investigation of the Reaction NO + OH + O2 → HO2 + NO2
- Resource Type
- Authors
- Luc Vereecken; Emmanuel Assaf; Christa Fittschen
- Source
- The Journal of Physical Chemistry A. 121:4652-4657
- Subject
- 010304 chemical physics
Chemistry
Radical
Photodissociation
Analytical chemistry
010402 general chemistry
01 natural sciences
0104 chemical sciences
Reaction rate constant
Laser photolysis
0103 physical sciences
Potential energy surface
Master equation
Physical chemistry
Physical and Theoretical Chemistry
- Language
- ISSN
- 1520-5215
1089-5639
Photolysis of NO2 is the only major pathway for O3 formation as products from the reaction of OH and NO under atmospheric conditions in competition to the formation of HONO has been investigated experimentally and theoretically. Experiments have been carried out by directly measuring the formation of HO2 radicals using laser photolysis coupled to cw-CRDS. OH radicals have been generated from the reaction of F atoms with H2O, and absolute HO2 and OH profiles have been recorded at different NO concentrations. The potential energy surface has been calculated and the rate constant has been obtained from RRKM master equation modeling. Both experiment and theory show that the OH + NO reaction in the presence of O2 bath gas is not a competitive source of HO2 + NO2.