Electrons Mediate the Gas‐Phase Oxidation of Formic Acid with Ozone |
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| Authors: | Dr Christian van?der?Linde Wai‐Kit Tang Dr Chi‐Kit Siu ProfDr Martin K Beyer |
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| Affiliation: | 1. http://www.uibk.ac.at/ionen‐angewandte‐physik/
0000-0003-0493-820X
Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universit?t Innsbruck, Innsbruck, Austria;2. http://www6.cityu.edu.hk/bhdbapp/deptweb/profile/drcks.html
0000-0001-8649-1805
Department of Biology and Chemistry, City University of Hong Kong, Kowloon Tong, Hong Kong SAR, China;3. Department of Biology and Chemistry, City University of Hong Kong, Kowloon Tong, Hong Kong SAR, China;4. Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universit?t Innsbruck, Innsbruck, Austria |
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| Abstract: | Gas‐phase reactions of CO3.? with formic acid are studied using Fourier transform ion cyclotron resonance (FT‐ICR) mass spectrometry. Signal loss indicates the release of a free electron, with the formation of neutral reaction products. This is corroborated by adding traces of SF6 to the reaction gas, which scavenges 38 % of the electrons. Quantum chemical calculations of the reaction potential energy surface provide a reaction path for the formation of neutral carbon dioxide and water as the thermochemically favored products. From the literature, it is known that free electrons in the troposphere attach to O2, which in turn transfer the electron to O3. O3.? reacts with CO2 to form CO3.?. The reaction reported here formally closes the catalytic cycle for the oxidation of formic acid with ozone, catalyzed by free electrons. |
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| Keywords: | electron gas-phase reactions radical ions reaction mechanisms reactive intermediates |
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