The adsorption and subsequent dissociation of CH3I on Pd(100) have been investigated with ultraviolet photoelectron spectroscopy, Auger electron spectroscopy, temperature-programmed desorption, and work function change over the temperature range 85–600 K. We find that CH3I adsorbs molecularly at 85 K and dissociates at 100–150 K to give adsorbed I and CH3. The latter compound decomposes above 150 K to yield methane. The thermal stability of adsorbed CH3 (250 K) is much lower than that found for CH3 (400 K) formed in the dissociation of CH3OH on the Pd(111) surface2.
ASJC Scopus subject areas
- Colloid and Surface Chemistry