Fig. 6: Temporal concentration profiles of HCOOH.

The black square represents measured temporal profile with a time resolution of 12 μs. The red solid line represents simulation profile using the kinetic model shown in Supplementary Table 3. Here, [CH2OO]0 = 3.71 × 1013 molecule cm−3, [HCHO]0 = 4.0 × 1015 molecule cm−3, PT = 15.1 Torr, and T = 296 K. Here, the data correspond to the experiment 1 listed in Supplementary Table 4.