Abstract
We have performed an XPS, TDS, ISS and LEED investigation on the adsorption of ruthenium carbonyl, Ru3(CO)12, on a Co(0001) surface. The adsorption of the carbonyl is molecular at 120 K and its dissociation occurs at 300 K via desorption of CO molecules. The desorption of CO is completed above 500 K, after which XPS and ISS indicate an atomically clean bimetallic surface, and LEED reveals a hexagonal (1 × 1) pattern. The ISS and XPS measurements as a function of Ru coverage indicate the formation of a surface alloy. The lattice constant of the alloy shifts from bulk Co value to bulk Ru value during the Ru deposition. The surface alloy formation is discussed in terms of a Monte Carlo simulation.
Original language | English |
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Pages (from-to) | 11-20 |
Number of pages | 10 |
Journal | Surface Science |
Volume | 346 |
Issue number | 1-3 |
DOIs | |
Publication status | Published - 1 Feb 1996 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Carbon monoxide
- Carbonyl
- Cobalt
- Computer simulations
- Growth
- Low energy ion scattering (LEIS)
- Low index single crystal surfaces
- Ruthenium
- Thermal desorption spectroscopy
- X-ray photoelectron spectroscopy