Entangled iodine and hydrogen peroxide formation in ice. Issue 29 (21st July 2020)

• Record Type: Journal Article
• Authors: Baek, Yong Su; Kim, Kitae; Saiz-Lopez, Alfonso; Min, Dae Wi; Kim, Bomi; Choi, Wonyong; Choi, Cheol Ho
• Is Part Of: Physical chemistry chemical physics. Volume 22:Issue 29(2020)
• Page Start: 16532
• Page End: 16535
• Publication Date: 2020-07-21
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/d0cp02966a
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : Simultaneous formations of H2 O2 and iodine with and without sunlight in acidic icy water. Abstract : Ice-core records show that anthropogenic pollution has increased the global atmospheric concentrations of hydrogen peroxide and iodine since the mid-20th century. Here, for the first time, we demonstrate a highly efficient mechanism that synergistically produces them in icy water conditions. This reaction is aided by a key intermediate IO2 H, formed by an I − ion with a dissolved O2 in acidic icy water, which produces both I as well as O2 H radicals. I recombines with I − to produce I2 − at a diffusion-limited rate, followed by formation of I3 − through disproportionation, while O2 H yields H2 O2 with I − and a proton dissolved in icy water.