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  • New Palladium - ZrO 2 Nano-...
    Alsalahi, Waleed; Augustyniak, Adam W; Tylus, Włodzimierz; Trzeciak, Anna M

    Chemistry : a European journal, 2022-Jan-27, 2022-01-27, Letnik: 28, Številka: 6
    Journal Article

    The new nanocomposites, Pd/C/ZrO , PdO/ZrO and Pd/PdO/ZrO , were prepared by thermal conversion of Pd@UiO-66-Zr-NH (MOF) in nitrogen or air atmosphere. The presence of Pd nanoparticles, uniformly distributed on the ZrO or C/ZrO matrix, was evidenced by transmission electron microscopy, scanning electron microscopy (SEM), Raman and X-ray Photoelectron Spectroscopy (XPS) methods. All pyrolysed composites retained the shape of the MOF template. They catalyze carbonylative Suzuki coupling under 1 atm CO with an efficiency significantly higher than the original Pd@UiO-66-Zr-NH . The most active PdO/ZrO composite, formed benzophenone with TOF up to 1600 h , while by using Pd@UiO-66-Zr-NH , much lower TOF values, 51-95 h , were achieved. After the reaction, PdO/ZrO was recovered with the same composition and catalytic activity. Very good results were also obtained in the transfer hydrogenation of benzophenones to alcohols with Pd/C/ZrO and PdO/ZrO catalysts under microwave irradiation.