Interpretation of the Carbon Auger Line Shapes from Adsorbed and Fragmented Ethylene on Ni (100)
Abstract
The carbon KVV Auger line shapes of ethylene on nickel (100) at 100, 250, and 350 K are consistently interpreted. These line shapes are representative of pi-bonded ethylene and di-sigma bonded acetylene. The Auger line shape of graphite on Ni is also interpreted. The line shapes are found to consist of adsorbate-adsorbate, adsorbate-substrate, and substrate-substrate components, which are denoted by the final location of the two holes created by the Auger process. The adsorbate-adsorbate component, for each of the molecular adsorbates, reflects the density of states of ethylene and shows negligible hole-hole correlation effects due to charge transfer from the metal. The other two components directly reflect the adsorbate-substrate pi or sigma bonding character and the extent of screening via charge transfer from the metal to the core excited adsorbate. Keywords: Catalysis, Chemisorption, Auger spectroscopy.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1988
- Accession Number
- ADA201982
Entities
People
- David E. Ramaker
- F. L. Hutson
Organizations
- George Washington University