Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 10, Issue 40, Pages 6144-6149Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b808341j
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Funding
- Stichting voor Fundamenteel Onderzoek der Materie (FOM)
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The adsorption of a single CO molecule on clusters of the Group 10 transition metals is characterized by infrared multiple photon dissociation (IR-MPD) spectroscopy. The cationic, neutral, and anionic carbonyl complexes contain between 3 and up to 25 metal atoms. The C-O stretching frequency nu(CO) shows that while both nickel and platinum clusters adsorb CO only in atop positions, palladium clusters exhibit a variety of binding sites. These findings can be rationalized by considering the increasing role relativistic effects play in the electronic structure of the cluster complexes going down the group. Conclusions for the cluster-support interactions for size-selected supported particles are drawn from the charge dependence of nu(CO) for the gas-phase species.
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