Infra-red reflection absorption spectroscopic study on adsorption structures of acrolein on polycrystalline gold and Au(111) surfaces under ultra-high vacuum conditions

Chemoselective hydrogenation of carbonyl compounds over heterogeneous catalysts

“…Acrolein adsorption was also investigated on Au(1 1 1), Ag(1 1 1) and on polycrystalline gold surfaces at 80 K with infrared reflection absorption method [192]. Analogously to Jesus et al [179] the parallel adsorption of acrolein was observed on Au(1 1 1) surfaces [192], whereas on polycrystalline gold surfaces y(C O) and v(CH 2 ) bands were observed. Additionally, acrolein was adsorbed in less ordered state on Ag(1 1 1) than on Au (1 1 1).…”

“…Adsorption of acrolein and crotonaldehyde has been investigated by RAIRS and TPD [179,180] as well as with infrared reflection absorption [192]. Acrolein was adsorbed in a flat geometry on Pt(1 1 1) according to RAIRS measurement at low coverage (Fig.…”

“…Low coordination metal sites favor production of saturated aldehydes while (1 1 1) flat terraces lead to formation of unsaturated alcohols [179]. Acrolein adsorption was also investigated on Au(1 1 1), Ag(1 1 1) and on polycrystalline gold surfaces at 80 K with infrared reflection absorption method [192]. Analogously to Jesus et al [179] the parallel adsorption of acrolein was observed on Au(1 1 1) surfaces [192], whereas on polycrystalline gold surfaces y(C O) and v(CH 2 ) bands were observed.…”

Theoretical insight of adsorption thermodynamics of multifunctional molecules on metal surfaces

“…Indeed, the large number of flat adsorption configurations is a critical issue which complicates the identification of the adsorption structures [14,13,16,15]. However, the presence of ridges along the metallic surface limits the number of the stable sites in competition along these terminal rows.…”

“…A few fundamental studies of these ethene derivatives are available in the literature. The adsorption of several multifunctional molecules has been investigated on Pt(1 1 1) at 95 K from X-ray and ultraviolet photoelectron spectroscopy (XPS and UPS respectively), near-edge extended X-ray absorption fine structure (NEXAFS) and reflection absorption infrared spectroscopy (RAIRS) experimental techniques [10][11][12][13][14]. At this low temperature, the formed monolayer is oriented almost parallel to the surface.…”