The adsorption and dissociation of methanol on Pd(100) and supported Pd catalysts were investigated in the temperature range 90–300 K. By means of photoelectron, infrared and thermal desorption spectroscopies, condensed layer, chemisorbed and dissociated methanol were distinguished. Methanol decomposes through the formation of a methoxy species. No adsorbed CH3 was detected either on Pd(100) or on supported Pd. In the latter case the transient formation of acetaldehyde was identified at 200 K. Potassium additives significantly increased the extent of dissociation, markedly stabilized the methoxy species formed, and induced a small extent of cleavage of the methanolic C-O bond.
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry