Temperature dependence of the reaction HO2+NO→OH+NO2

Abstract

The title reaction has been studied using laser magnetic resonance detection of HO₂ radicals in a discharge flow system. For the range 403≳T≳232 K, k₁= (7.9±1) (T/300)^{−0.83±0.18} ×10⁻¹² cm³ molecule⁻¹ s⁻¹. Upper limits are placed on the rate constants for the reactions of (HO₂+NO) that yield HNO and HOONO: kk₁. Measurements have also been made that indicate that the reactions of HO₂ with CO and N₂O are very slow at 300 K. These rate constants are less than about 5×10⁻¹⁷ cm³ molecule⁻¹ s⁻¹.