Structure and catalytic activity of palladium–platinum aggregates obtained by laser vaporisation of bulk alloys

Competitive hydrogenation of poly-aromatic hydrocarbons on sulfur-resistant bimetallic Pt-Pd catalysts

“…These differences would indicate that the enhancement in sulfur tolerance gained by the addition of Pd can be easily lost under the rather severe conditions of the hydrogenation of polynuclear aromatics. In fact, Rousset et al [21] have shown that, when the role of the support is eliminated, the addition of Pd does not alter the deactivation caused by H 2 S at 300 • C. In a separate study, the same authors have compared the activity of Pt and Pd for the hydrogenation of tetralin in the presence of variable amounts of H 2 S [47]. They found that Pt was more active than Pd at low sulfur concentrations, but Pd became more active at high S concentrations.…”

Structure and Size of Bimetallic Palladium-Platinum Clusters in an Hydrotreatment

“…Regarding academic studies, several studies have been already dedicated to the structure at the atomic scale of this bimetallic catalyst [18][19][20][21][22]. In some cases, contradictory results were found with no enhancement of the sulfur resistance or hydrogenation activity [23][24].…”

EXAFS study on the sulfidation behavior of Pd, Pt and Pd–Pt catalysts supported on amorphous silica and high-silica USY zeolite

“…Typically, using acidic crystalline or amorphous supports is effective in increasing the sulfur tolerance of noble metal catalysts due to the electron deficiency of noble metal particles [2,4,10,11,13,17,20,22]. However, as reported in our previous paper [25], Pd, Pt monometallic and Pd-Pt bimetallic catalysts supported on slightly acidic USY zeolite (SiO 2 /Al 2 O 3 = 390) and non-acidic silica with small mesopores showed high sulfur tolerances and high aromatic hydrogenation activities.…”