Abstract
A new flexible periodic LEPS potential energy surface (FPLEPS) based on density functional theory data is constructed for the interaction of atomic oxygen with an O-preadsorbed graphite (0001) surface over a C–C bridge. New ingredients were added to the usual expression of the FPLEPS in order to take into account the entrance barriers, molecular orientation, and morphology of the surface. A total of 563 DFT points were used to fit the Eley–Rideal (ER) reaction channel, achieving a root-mean-square deviation of 0.120 eV for energies lower than 1 eV over reactants. A quasiclassical trajectory (QCT) dynamics study has been performed at several initial conditions: collision energies (0.01 ≤ Ecol ≤ 2.0 eV), incident angles (θv = 0°, 45°), and surface temperatures (100 ≤ Tsurf ≤ 900 K). Also quasithermal and hyperthermal (⟨Ecol⟩ = 5.2 eV) conditions were considered. Eley–Rideal reaction and O reflection were the main processes, keeping the formed O2 molecules translationally and internally excited via the ER pr...
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