Bimetallic Gold–Palladium vapour derived catalysts: The role of structural features on their catalytic activity

Characterization of a Poly‐4‐Vinylpyridine‐Supported CuPd Bimetallic Catalyst for Sonogashira Coupling Reactions

“…The co‐condensation of palladium and copper metals together with mesitylene and 1‐hexene solvents was carried out in a static MVS reactor, equipped with two alumina‐coated tungsten crucibles that allowed evaporating independently the two metals. 150 mg of Pd and 60 mg of Cu were co‐condensed with a mixture of 1‐hexene (30 mL) and mesitylene (30 mL) under high vacuum (10 −5 mBar) on the cooled wall (−196 °C) of a glass MVS reactor chamber for one hour.…”

A Gold–Palladium Nanoparticle Alloy Catalyst for CO Production from CO2 Electroreduction

“…Bimetallic Au–Pd alloy NPs were synthesized by the simultaneous co‐condensation of Au and Pd vapors together with acetone vapor affording Au–Pd/acetone solvated metal atoms (SMAs), according to an MVS procedure . This synthetic approach affords control over the size and composition of Au–Pd NPs that are stabilized by a weak interaction with the solvent (acetone) avoiding the presence of additional stabilizers to prevent NP aggregation .…”

“…All operations involving the MVS products were performed under a dry argon atmosphere using standard Schlenk techniques. The co‐condensation of Au, Pd, and acetone vapors was carried out in a static MVS reactor described in detail in previous publications . Pd powder (99.999%) and Au beads (1–6 mm, 99.999%) were purchased from Aldrich.…”

“…According to the MVS procedure, Pd and Au vapors were generated by resistive heating of two different alumina‐coated tungsten crucibles filled with Pd (150 mg, powder) and Au (50 mg, beads) . They were co‐condensed simultaneously at a liquid nitrogen temperature with acetone (100 mL) in the glass reactor chamber of the MVS apparatus for 1 h. The reactor chamber was then warmed to the melting point of the solid matrix (≈−95 °C), and the resulting red–brown solution of Au–Pd NPs, named Au–Pd SMAs, was siphoned at a low temperature into a Schlenk tube and stored at −40 °C.…”

“…In this work, we discuss the activity of carbon‐supported Au–Pd bimetallic NPs synthesized by the simultaneous co‐condensation of Pd and Au vapors with acetone vapor (metal vapor synthesis [MVS]). We have reported this method previously as a valuable synthetic approach to obtain catalytically active supported Au–Pd‐alloyed bimetallic NPs with controlled sizes . In this work, a complete characterization of the Au–Pd NPs on carbon is presented including X‐ray diffraction (XRD), X‐ray adsorption near edge spectroscopy (XANES), high‐resolution transmission electron microscopy (HRTEM), and high‐angle annular dark‐field scanning transmission electron microscopy (HAADF–STEM) combined with energy‐dispersive X‐ray spectroscopy (EDS) analysis and electrochemical studies.…”