Abstract
The adsorption of Ni8 clusters on the anionic (Mg 25O240/+/2+, Fs0/+/2+) and cationic (Mg24O250/-/2-, Vs 0/-/2-) vacancies, as well as on the regular sites (Mg 25O25, Mg2+ and NiMg24O 25, Ni2+) of the MgO(001) surface has been investigated at the PW91/DND level of density functional theory. On the basis of the computed adsorption energies, the metal deposition has the decreasing order of Ni 8/Vs > Ni8/Vs- > Ni8/Vs2- > Ni8/Fs 2+ ≈ Ni8/ Ni2+ ≈ Ni8/F s+ ≈ Ni8/Mg2+ > Ni 8/Fs, > Ni8/O2-. Strong electron and charge transfers are found between Ni8 cluster and vacancies or regular sites. The electronic property of the vacancies has been analyzed.
| Original language | English |
|---|---|
| Pages (from-to) | 8359-8363 |
| Number of pages | 5 |
| Journal | Journal of Physical Chemistry B |
| Volume | 108 |
| Issue number | 24 |
| DOIs | |
| State | Published - 17 Jun 2004 |