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Angular distributions and rovibrational excitation of N2 molecules recombined on N-covered Ag(1 1 1) by the Eley-Rideal mechanism

AuthorsJuaristi Oliden, Joseba Iñaki ; Díaz, Estíbaliz; Bocan, Gisela A.; Díez Muiño, Ricardo ; Alducin Ochoa, Maite ; Blanco-Rey, María
KeywordsMolecular beams
Gas–surface dynamics
Potential energy surface
Atomic N
Issue Date2015
CitationCatalysis Today 244: 115-121 (2015)
AbstractFormer calculations showed that atomic N incident at energies of a few eV on N-covered Ag(1 1 1) forms N2 molecules by the Eley-Rideal (ER) mechanism, i.e. by direct pick-up of adsorbates. Here, we calculate the azimuthal angle distributions and the rovibrational energies of those ER products. We observe a non-trivial angle dependence that may result in very low in-plane ER yield for some given incident azimuthal angles. We find that most of the energy released upon NN bond formation, about 7 eV, is stored in the rovibrational degrees of freedom independently of the incidence energy considered.
Identifiersdoi: 10.1016/j.cattod.2014.06.028
issn: 0920-5861
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