Journal of the American Chemical Society p. 1782 - 1792 (1989)
Update date:2022-08-16
Topics:
Davis
Barteau
The adsorption and reaction of formaldehyde, acetaldehyde, and propanal were compared in temperature-programmed desorption (TPD) and high-resolution electron energy loss spectroscopy (HREELS) studies on a clean Pd(111) surface. Formaldehyde reacted upon adsorption at 170 K via decomposition to CO(a) and H(a) and polymerization to paraformaldehyde. In contrast, decomposition of the higher aldehydes required significantly higher temperatures. Acetaldehyde adsorbed on the clean surface in an η2 configuration and reacted to form stable acetyl species which decomposed above 300 K to produce CO(a), H(a), and C1 hydrocarbon fragments. Adsorbed acetyl groups were readily identified by the characteristic frequency of their CO stretch at 1565 cm-1.
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