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Pd/Fe<sub>3</sub>O<sub>4</sub> Nanofibers for the Catalytic Conversion of Lignin-Derived Benzyl Phenyl Ether under Transfer Hydrogenolysis Conditions
oleh: Angela Malara, Emilia Paone, Lucio Bonaccorsi, Francesco Mauriello, Anastasia Macario, Patrizia Frontera
Format: | Article |
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Diterbitkan: | MDPI AG 2019-12-01 |
Deskripsi
Novel magnetite-supported palladium catalysts, in the form of nanofiber materials, were prepared by using the electrospinning process. Two different synthetic techniques were used to add palladium to the nanofibers: (i) the wet impregnation of palladium on the Fe<sub>3</sub>O<sub>4</sub> electrospun support forming the Pd/Fe<sub>3</sub>O<sub>4</sub>[wnf] catalyst or (ii) the direct co-electrospinning of a solution containing both metal precursor specimens leading to a Pd/Fe<sub>3</sub>O<sub>4</sub>[cnf] sample. The obtained Pd-based Fe<sub>3</sub>O<sub>4</sub> nanofibers were tested in the transfer hydrogenolysis of benzyl phenyl ether (BPE), one of the simplest lignin-derived aromatic ethers, by using 2-propanol as H-donor/solvent, and their performances were compared with the analogous impregnated Pd/Fe<sub>3</sub>O<sub>4</sub> catalyst and a commercial Pd/C. A morphological and structural characterization of the investigated catalysts was performed by means of SEM-EDX, TGA-DSC, XRD, TEM, H<sub>2</sub>-TPR, and N<sub>2</sub> isotherm at 77 K analysis. Pd/Fe<sub>3</sub>O<sub>4</sub>[wnf] was found to be the best catalytic system allowing a complete BPE conversion after 360 min at 240 °C and a good reusability in up to six consecutive recycling tests.