Complexation and abstraction channels in the Al + CO2 reaction |
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| Affiliation: | 1. University of Dayton Research Institute, 300 College Park, Dayton, OH 45469-0170, USA;2. Air Force Research Laboratory, Materials and Manufacturing Directorate, 3005 Hobson Way, Wright-Patterson Air Force Base, OH 45433, USA;3. NCEM, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA;4. Spintronics and Vacuum Nanoelectronics Laboratory, University of Cincinnati, Cincinnati, OH 45221, USA;5. Physics of Interfaces and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands;6. NASA Glenn Research Center, Cleveland, OH 44135, USA |
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| Abstract: | The AI + CO2 reaction is studied in the gas phase at 296 K by laser-induced fluorescence monitoring of Al and AlO. Pressure dependence of the effective bimolecular rate constant in the range 10–600 Torr (Ar+CO2) indicates a complex formation channel yielding a stable Al·CO2 adduct. Observation of AlO confirms the presence of an abstraction channel. A simple chemical activation mechanism is used to interpret the pressure dependence of the effective bimolecular rate constant. The activation energy for Al·CO2 complex formation is estimated at ⪢ 1.0 kcal mol−1, and the binding energy is estimated at ⪢ 9 kcal mol−1. |
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