Angular distributions and rovibrational excitation of N-2 molecules recombined on N-covered Ag(111) by the Eley-Rideal mechanis

作者：Juaristi J I; Diaz E; Bocan G A; Muino R Diez; Alducin M; Blanco Rey M^*

来源：Catalysis Today, 2015, 244: 115-121.

DOI：10.1016/j.cattod.2014.06.028

• Gas-surface dynamics
• Eley-Rideal
• Potential energy surface
• Molecular beams
• Atomic N
• N-2

Former calculations showed that atomic N incident at energies of a few eV on N-covered Ag(1 1 1) forms N-2 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 N-N bond formation, about 7 eV, is stored in the rovibrational degrees of freedom independently of the incidence energy considered.

• 出版日期2015-4-15