title: Reactivity of crotonaldehyde and propene over Au/Pd(111) surfaces.
abstract: The surface chemistry of crotonaldehyde and propene, primary and secondary reaction products in the aerobic selective oxidation of crotyl alcohol, has been studied by temperature-programmed reaction over Au/Pd(111) surface alloys. Gold strongly promotes desorption versus reaction at mole fractions > or = 0.3 (crotonaldehyde) and > or = 0.8 (C(3)H(6)); only approximately 5% of the chemisorbed aldehyde or alkene react over Au-rich alloys. Surprisingly, co-adsorbed oxygen strongly suppresses crotonaldehyde decomposition over both clean Pd(111) and alloy surfaces, while C(3)H(6) combustion, an important undesired side-reaction over unpromoted Pd(111), is also moderated by Au.
authors.affiliation: Department of Physics, University of York, York, UK YO10 5DD.
authors.forename: James
authors.initials: J
authors.lastname: Naughton
authors.forename: Adam F
authors.initials: AF
authors.lastname: Lee
authors.forename: Sarah
authors.initials: S
authors.lastname: Thompson
authors.forename: C P
authors.initials: CP
authors.lastname: Vinod
authors.forename: Karen
authors.initials: K
authors.lastname: Wilson