Effect of dispersion of supported palladium on its electronic and catalytic properties in the hydrogenation of vinylacetylene

Recent Advances in the Liquid‐Phase Synthesis of Metal Nanostructures with Controlled Shape and Size for Catalysis

“…There were single crystals characterized by a slightly truncated shape bounded by (100), (110), and (111) facets. Addition of sodium chloride during the synthesis (78) promoted the formation of truncated cubes.…”

“…Numerous investigations have been carried out on Pd size effect in alkyne and alkadiene hydrogenations (18,19,109,110). Highly electronegative alkynes bind to metals with a back-donation of the metal d electrons to the empty p*-antibonding orbitals of the molecule, making the bonding to the metal stronger as compared to olefins.…”

“…For example, active sites on highly dispersed metal particles can facilitate decarbonylation, as seen from the studies of 3-methyl-crotonaldehyde hydrogenation over Pt (111), (110), (553) surfaces (21,131). Pt (110), which has a furrowed structure and hence a greater number of low coordination atoms, exhibits the highest selectivity to decarbonylation products. The same effect of the sites inhibition by produced CO was found for citral hydrogenation (107).…”

“…Mechanism of electrocatalytic reduction of nitric oxide in acidic media was studied on Pt(100), Pt (110) and Pt(111) (171). The adsorption of nitric oxide on Pt(100) results in the formation of an adlayer with a structure similar to that formed under ultrahigh vacuum conditions.…”

“…(30,31)), only the mentioned structures are reviewed. The reason is that their surface structures unambiguously reveal the catalytic reaction active sites, as nanocubes and nanotetrahedrons contain only (100) and (111) facets, respectively, while majority of nanowires and nanorods are composed predominantly from (100) or (110). The spheres containing both (100) and (111) facets are also included into discussion due to their extensive application in structure-sensitive reactions, as the number of atoms on the facets depend a particle size.…”