Abstract
The supported bimetallic Fe—Pd/SiO2 catalysts with the different Fe (0.025—8 mass.%) and Pd (0.05—3.2 mass.%) loadings were synthesized by the incipient wetness impregnation of support. The samples were heat-treated under different conditions (calcination in air at 240—350 °C or reduction in an H2 flow at 400 °C). The X-ray phase analysis revealed the formation of Pd0, α-Fe2O3 and Fe3O4 phases after calcination of the samples at 240—260 °C. The reduction of the calcined Fe—Pd samples in an H2 flow at 400 °C enables the formation of Fe0 nanoparticles of size 17—20 nm. The synthesized catalytic systems were studied in the selective hydrogenation of phenylacetylene at room temperature and atmospheric pressure in a solvent (ethanol, propanol). The catalytic properties of the Fe—Pd catalysts depend on the nature of solvent, catalyst composition, and thermal treatment conditions. The application of the Fe—Pd bimetallic catalysts with a low Pd loading of 0.05—0.1 mass.% made it possible to reach the high activity and selectivity to styrene (91%) at the complete conversion of phenylacetylene.
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 0432—0439, February, 2016.
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Shesterkina, A.A., Kozlova, L.M., Kirichenko, O.A. et al. Influence of the thermal treatment conditions and composition of bimetallic catalysts Fe—Pd/SiO2 on the catalytic properties in phenylacetylene hydrogenation. Russ Chem Bull 65, 432–439 (2016). https://doi.org/10.1007/s11172-016-1317-z
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DOI: https://doi.org/10.1007/s11172-016-1317-z