Summary abstract: the coadsorption of CO and K on Rh(111): an HREELS, TPD, AES, and LEEd study

Journal Article · · J. Vac. Sci. Technol., A; (United States)

DOI:https://doi.org/10.1116/1.572534· OSTI ID:5485293

Crowell, J E; Somorjai, G A

Alkali metal additives are commonly used to alter the reactivity and selectivity of transition metals that catalyze important chemical reactions. It is thought that by transferring substantial electronic charge to the transition metal substrate, alkali additives increase the electron density at the surface. As a consequence, the chemisorptive properties of these surfaces are modified, resulting in changes in catalyst activity and product distribution. One such reaction catalyzed by several transition metals (e.g., Fe, Ni, Rh, and Ru) that are often altered in activity by alkali additives is the hydrogenation of carbon monoxide. In order to understand the role of the alkali adatoms in promoting this reaction, it is important to elucidate the nature of the interaction between the alkali and the coadsorbed species. Hence, they have combined Auger electron spectroscopy (AES), low-energy electron diffraction (LEED), temperature programmed thermal desorption (TPD), and high resolution electron energy loss spectroscopy (HREELS) in order to determine the effect of potassium on the adsorption of carbon monoxide on the Rh(111) surface.

• Research Organization: Lawrence Berkeley Lab., CA
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5485293
• Journal Information: J. Vac. Sci. Technol., A; (United States), Journal Name: J. Vac. Sci. Technol., A; (United States) Vol. 2:2; ISSN JVTAD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656000 -- Condensed Matter Physics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ADSORPTION
ALKALI METALS
AUGER ELECTRON SPECTROSCOPY
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COHERENT SCATTERING
DIFFRACTION
DISSOCIATION
ELECTRON DIFFRACTION
ELECTRON SPECTROSCOPY
ELECTRON TRANSFER
ELEMENTS
METALS
OXIDES
OXYGEN COMPOUNDS
POTASSIUM
RHENIUM
SCATTERING
SORPTION
SPECTROSCOPY
TRANSITION ELEMENTS