The H+NO recombination reaction over a wide temperature range

Rate coefficients of the title reaction have been measured in a high‐temperature photochemistry (HTP) reactor using Ar as the bath gas. H atoms were generated by flash photolysis of NH 3 and their relative concentrations were monitored by resonance fluorescence. The data are best fitted by k (295–905 K) = 6.5 × 10 −34 ( T /K) 0.206 exp(780K T ) cm 6 molecule −2 s −1 , with ±2σ precision values varying from 16 to 36% and corresponding suggested accuracy levels of 29–42%. Using a literature value for the relative collision efficiencies of N 2 and Ar indicates that for N 2 as the third body the above rate coefficient expression should be multiplied by 1.6. This leads to good agreement with two recent near 1000 K measurements. © 2003 Wiley Periodicals, Inc. Int J Chem Kinet 35: 374–380, 2003