Abstract
The chemisorption of O//2, CO, CO//2, H//2, N//2, and CH//3OH on the clean (111) surface of nickel disilicide (NiSi//2) was studied under ultrahigh vacuum conditions. Samples were characterized by high-resolution electron energy loss spectroscopy, low-energy electron diffraction, and Auger electron spectroscopy with experiments carried out between 170 and 300 K. The vibrational spectra clearly indicate that O//2, CO, and CO//2 dissociate on NiSi//2(111) at 170 K. Adsorbed CH//3OH yielded only a methoxide species, even at 300 K. No evidence was found for either molecular H//2 or molecular N//2 adsorption, although atomic hydrogen is strongly bound to the silicide surface. The implications of these unusual findings with respect to both heterogeneous catalysis by supported metal particles and strong metal-support interactions are discussed.
Original language | English (US) |
---|---|
Pages (from-to) | 365-369 |
Number of pages | 5 |
Journal | Journal of the American Chemical Society |
Volume | 105 |
Issue number | 3 |
DOIs | |
State | Published - Feb 1983 |
Externally published | Yes |
ASJC Scopus subject areas
- Catalysis
- Chemistry(all)
- Biochemistry
- Colloid and Surface Chemistry