Bonding of CO to Metal Particles: Photoelectron Spectra of Nin\(CO\) -m and Ptn\(CO\) -m Clusters
Abstract
Photoelectron spectra of mass-selected negatively charged bare Ni -n and Pt -n clusters are compared with the spectra of NinCO-m and Ptn\(CO\) -m clusters. The spectra indicate that saturation with CO is caused by the formation of an electronic closed shell and not due to steric hindrance as on a surface, and that the strength of the π backdonation of the CO chemisorption bond to a small particle is stronger than to a surface. The antibonding metal \(dz2-5σ\) orbital resulting from the interaction of the CO 5σ with the metal dz2 orbitals is directly observed for Ni1\(CO\) -3.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 1996
- DOI:
- 10.1103/PhysRevLett.76.1047
- Bibcode:
- 1996PhRvL..76.1047S