Measurements of low energy electron transmission spectrum and work function φ of a Ni(111) surface held at T = 5.5 K during exposure to CO provide direct evidence for a precursor adsorption preceding chemisorption. Subsequent warming of the CO covered surface leads to the chemisorption state. An analysis of the kinetics of the increase in φ that accompanies this transition gives an activation energy of ~ 4 meV for the reaction.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry