Heterogeneous Photochemistry Relevant to the Troposphere: H₂O₂ Production during the Photochemical Reduction of NO₂ to HONO on UV‐Illuminated TiO₂ Surfaces

Abstract

Bleached out: The detection of an oxidized co-product, hydrogen peroxide, during an important tropospheric reaction, combined with the detection of photoaccelerated surface nitrate formation (a competing pathway), allows a likely mechanism to be proposed (see figure) which explains previously observed experimental stoichiometries.