High-Temperature Photochemistry Kinetics Study of the Reaction H + NO2 -> OH + NO from 296 to 760 K

Article abstract of DOI:10.1021/j100163a019

Rate coefficients for the H + NO2 -> OH + NO reaction have been measured by using the high-temperature photochemistry (HTP) technique.H atoms are generated by flash photolysis of CH4, and their relative concentration is monitored by time-resolved resonance-fluorescence detection.The data are well-fitted by the empirical expression k(T) = 2.2 * 10^-10 exp(-182 K/T) cm³ molecule^-1 s^-1 for the 296-760 K temperature range.The precision of the data is 7percent, and the accuracy is estimated to be 21percent, where both figures represent 2? statistical confidence intervals.Comparison of the ratio of the experimental reaction cross sections, at the temperature extremes, to the theoretical ratio supports a zero energy barrier.The potential stabilization channel leading to HONO is discussed.