We show that by combining laser-induced thermal desorption with conventional thermal desorption spectroscopy, one can determine separately the activation energy Ed and the pre-exponential factor ν for desorption with good accuracy. Results on CO on Ni(111) yield Ed≈ 25.5 kcal/mol and ν≈ 1013/s. They agree well with values obtained by other techniques and suggest that above room temperature, CO on Ni(111) is in a highly mobile gas-like phase.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Condensed Matter Physics
- Atomic and Molecular Physics, and Optics
- Surfaces and Interfaces