The interaction range in alkali metal-promoted systems
1988; Elsevier BV; Volume: 199; Issue: 1-2 Linguagem: Inglês
10.1016/0039-6028(88)90397-4
ISSN1879-2758
Autores Tópico(s)Quantum and electron transport phenomena
ResumoThe available experimental data of systems in which a molecule, mainly CO, is coadsorbed with an alkali metal on a metal surface are summarized with regard to the range of the alkali-coadsorbate interaction. We find that the primary promotion interaction is short-range and localized to 1–2 CO molecules per alkali adatom and is independent of initial alkali coverage. In addition, we find evidence, based primarily on vibrational data, for a longer-range alkali-molecule interaction as well, which is substantially weaker than the short-range interaction.
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