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<p>New bimetallic Pd-Fe catalysts supported on mesoporous Sibunit carbon material were obtained for the process of producing ethylene via selective hydrogenation of acetylene. The formation of active component in a reducing medium was studied in detail. Increasing the catalyst treatment temperature in H<sub>2</sub> up to 600&#xa0;°C leads to the formation of bimetallic iron-palladium particles of a solid Pd<sub>(1-x)</sub>Fe<sub>x</sub> solution which was found by in situ XRD, XANES, EXAFS, XPS and HR TEM. Palladium atoms preferentially adjoin to iron atoms after alloying, which leads to a change in the electronic state of palladium. Catalytic properties of Pd-Fe/Sibunit sample reduced in H<sub>2</sub> at 500&#xa0;°C are close to the unmodified catalyst (ethylene yield is 51%), since iron and palladium have a weak interaction. Reduction of Pd-Fe catalysts at 600–700&#xa0;°C leads to increase of selectivity and, despite of lower activity, allows to produce ethylene with a higher yield of 70%. The increase in selectivity is due to the modifying effect of iron on the electronic and geometric properties of palladium in bimetallic particles.</p> Graphical abstract <p></p>

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Interaction of iron with palladium in Pd-Fe catalysts supported on Sibunit carbon material for selective acetylene hydrogenation

  • 期刊论文

  • 发表日期：

    2026年4月27日

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  • Daria V. Yurpalova,
  • Zakhar S. Vinokurov,
  • Evgeny V. Khramov,
  • Igor P. Prosvirin,
  • Andrey V. Bukhtiyarov,
  • Maxim A. Panafidin,
  • Evgeny Yu. Gerasimov,
  • Elena A. Anoshkina,
  • Vyacheslav L. Yurpalov

摘要

New bimetallic Pd-Fe catalysts supported on mesoporous Sibunit carbon material were obtained for the process of producing ethylene via selective hydrogenation of acetylene. The formation of active component in a reducing medium was studied in detail. Increasing the catalyst treatment temperature in H2 up to 600 °C leads to the formation of bimetallic iron-palladium particles of a solid Pd(1-x)Fex solution which was found by in situ XRD, XANES, EXAFS, XPS and HR TEM. Palladium atoms preferentially adjoin to iron atoms after alloying, which leads to a change in the electronic state of palladium. Catalytic properties of Pd-Fe/Sibunit sample reduced in H2 at 500 °C are close to the unmodified catalyst (ethylene yield is 51%), since iron and palladium have a weak interaction. Reduction of Pd-Fe catalysts at 600–700 °C leads to increase of selectivity and, despite of lower activity, allows to produce ethylene with a higher yield of 70%. The increase in selectivity is due to the modifying effect of iron on the electronic and geometric properties of palladium in bimetallic particles.

Graphical abstract