Abstract
The adsorption of acrolein and propionaldehyde on the polar, Cu + -terminated Cu 2 O(100) surface was investigated using X-ray photoelectron spectroscopy (XPS) and thermal desorption spectroscopy (TDS). The major reaction products observed for both aldehydes were nonselective oxidation products (CO, CO 2 , and H 2 O). Propene and acrolein were also detected as minor reaction products during propionaldehyde thermal desorption. Additionally, propene and propionaldehyde were detected as minor products during the reaction of acrolein with preadsorbed hydrogen. The coincident desorption of the propionaldehyde, acrolein, and propene from either acrolein and preadsorbed hydrogen or propionaldehyde adsorption suggests that a common surface intermediate is involved in these minor side reactions
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