The Effect of Polymer Matrix on the Catalytic Properties of Supported Palladium Catalysts in the Hydrogenation of Alkynols

Palladium catalysts were obtained by the adsorption method involving sequential deposition of polyvinylpyrrolidone (PVP) and then palladium ions on a modified zinc oxide surface without high-temperature calcination reduction stages. The immobilized PVP-palladium characterized scanning electron microscopy (SEM), transmission (TEM), Brunauer–Emmett–Teller (BET), infrared spectroscopy (IRS), X-ray powder diffraction (XRD), photoelectron (XPS), elemental analysis methods. It was found that introduction polymer into catalyst’s composition promotes dispersion uniform distribution active phase nanoparticles (PdO, Pd0) oxide. tested in hydrogenation complex acetylene alcohol, 3,7,11-trimethyldodecyn-1-ol-3 (C15-yn) under mild conditions (0.1 MPa, 40 °C). For comparison, studies stereoselective short-chain alcohol 2-hexynol-1 performed. shown modification catalyst with improves its catalytic properties. High C15-alkenol selectivity (98%), activity (W = 70 × 10−6 mol/s), stability (turnover number (TON) 62,000) achieved Pd-PVP/ZnO catalyst. Varying made it possible to reduce metal content deteriorating performance