Synthesis of Supported Heterogeneous Catalysts by Laser Ablation of Metallic Palladium in Supercritical Carbon Dioxide Medium
Oleg Parenago,
Alexey Rybaltovsky,
Evgeniy Epifanov,
Andrey Shubnyi,
Galina Bragina,
Alexey Lazhko,
Dmitry Khmelenin,
Vladimir Yusupov,
Nikita Minaev
Affiliations
Oleg Parenago
Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prospekt, 119991 Moscow, Russia
Alexey Rybaltovsky
Skobel’tsyn Science Research Institute of Nuclear Physics, Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia
Evgeniy Epifanov
Institute of Photon Technologies, Federal Scientific Research Centre “Crystallography and Photonics” RAS, Pionerskaya Str. 2, Troitsk, 108840 Moscow, Russia
Andrey Shubnyi
Institute of Photon Technologies, Federal Scientific Research Centre “Crystallography and Photonics” RAS, Pionerskaya Str. 2, Troitsk, 108840 Moscow, Russia
Galina Bragina
Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russia
Alexey Lazhko
Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 31 Leninsky Prospekt, 119991 Moscow, Russia
Dmitry Khmelenin
FSRC “Crystallography and Photonics” RAS, 59, Leninskiy Prospekt, 119333 Moscow, Russia
Vladimir Yusupov
Institute of Photon Technologies, Federal Scientific Research Centre “Crystallography and Photonics” RAS, Pionerskaya Str. 2, Troitsk, 108840 Moscow, Russia
Nikita Minaev
Institute of Photon Technologies, Federal Scientific Research Centre “Crystallography and Photonics” RAS, Pionerskaya Str. 2, Troitsk, 108840 Moscow, Russia
To obtain a supported heterogeneous catalyst, laser ablation of metallic palladium in supercritical carbon dioxide was performed in the presence of a carrier, microparticles of γ-alumina. The influence of the ablation process conditions—including supercritical fluid density, ablation, mixing time of the mixture, and laser wavelength—on the completeness and efficiency of the deposition of palladium particles on the surface of the carrier was studied. The obtained composites were investigated by scanning and transmission electron microscopy using energy dispersive spectroscopy. We found that palladium particles were nanosized and had a narrow size distribution (2–8 nm). The synthesized composites revealed high activity as catalysts in the liquid-phase hydrogenation of diphenylacetylene.
