Gu, Alan Yalun and Hoffmann, Michael Robert (2021) Fast peroxymonocarbonate formation on aqueous aerosols. In: 262nd ACS National Meeting & Exposition, 22-26 August 2021, Atlanta, GA. https://resolver.caltech.edu/CaltechAUTHORS:20211215-160724797
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Abstract
Peroxymonocarbonate (HCO₄-) is a reactive oxygen species previously studied in chem. manufg. and water detoxification. However, its role in atm. chem. remains largely unexplored despite its high oxidative potential via oxygen-atom transfer reactions (E(HCO₄-/HCO₃-) = 1.8V) and the abundance of CO₂, H₂O and H₂O₂ in the atm. This work explores the formation of HCO₄- at the interface of an aq. H₂O₂ jet and an intersection stream of CO₂ gas in an online electrospray ionization mass spectrometry (o-ESI-MS) reacting for ~50 µs. The interfacial kinetics of HCO₄- formation is measured to be >10⁴ times faster than the bulk phase kinetics, possibly due to the incomplete hydrogen bonding network at the gas-liq. interface. Peroxymonocarbonate may play an important yet previously unexplored role in the oxidn. of atm. sulfides, (bi)sulfites and alkenes such as isoprene and pinene.
Item Type: | Conference or Workshop Item (Paper) | ||||||
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Additional Information: | © 2021 American Chemical Society. | ||||||
Record Number: | CaltechAUTHORS:20211215-160724797 | ||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20211215-160724797 | ||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
ID Code: | 112459 | ||||||
Collection: | CaltechAUTHORS | ||||||
Deposited By: | Tony Diaz | ||||||
Deposited On: | 17 Dec 2021 18:18 | ||||||
Last Modified: | 17 Dec 2021 18:18 |
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