H2O2 photoproduction inside H2O and H2O:O2 ices at 20-140 K

Mikhail Yu Kulikov; Alexander M Feigin; Otto Schrems

doi:10.1038/s41598-019-47915-w

H₂O₂ photoproduction inside H₂O and H₂O:O₂ ices at 20-140 K

Sci Rep. 2019 Aug 6;9(1):11375. doi: 10.1038/s41598-019-47915-w.

Authors

Mikhail Yu Kulikov¹, Alexander M Feigin², Otto Schrems³

Affiliations

¹ Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov Str., 603950, Nizhny, Novgorod, Russia. mikhail_kulikov@mail.ru.
² Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov Str., 603950, Nizhny, Novgorod, Russia.
³ Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, D-27570, Bremerhaven, Germany.

Abstract

We report the results of laboratory measurements of H₂O₂ production inside thin (50 nm thickness) H₂O and H₂O:O₂ ice samples irradiated by 121.6 nm photons at different temperatures. In the case of H₂O ice, H₂O₂ is formed at the temperatures below 60 К. In the case of H₂O:O₂ ice, H₂O₂ is formed in the 20-140 К range. For H₂O:O₂ = 9:1 ice, we derived H₂O₂ photochemical quantum yield as a function of sample irradiation temperature. The obtained data can be used for evaluation of H₂O₂ photoproduction at the surface of astrophysical water ice bodies and inside the particles of Noctilucent Clouds in the Earth's atmosphere.