A study on structural features of bimetallic Pd-M/C (M: Zn, Ga, Ag) catalysts for liquid-phase selective hydrogenation of acetylene

Daria V. Glyzdova, Aleksey A. Vedyagin, Anna M. Tsapina, Vasily V. Kaichev, Alexander L. Trigub, Mikhail V. Trenikhin, Dmitry A. Shlyapin, Pavel G. Tsyrulnikov, Alexander V. Lavrenov

    Research output: Contribution to journalArticle

    Abstract

    The present work is devoted to the study of doping effects of zinc, gallium and silver on the structure of active sites and catalytic properties of carbon-supported 0.5 wt% Pd catalysts in the liquid-phase selective hydrogenation of acetylene to ethylene. Carbonaceous graphite-like material Sibunit was used as a support. The reaction was performed in a medium of N-methyl-2-pyrrolidone at 55 °C. It was shown that the bimetallic Pd-Zn/C, Pd-Ga/C and Pd-Ag/C catalysts exhibit better activity and selectivity towards target product if compare with the monometallic Pd/C catalyst. The ethylene yield increases in a row as follows: Pd/C (19%) < Pd-Ag/C (34%) < Pd-Ga/C (42%) < Pd-Zn/C (53%). Using X-ray absorption spectroscopy and transmission electron microscopy it was found that an improvement of the selectivity is stipulated by the formation of bimetallic PdZn, PdxGay and PdAg nanophases. In the case of Pd-Zn/C and Pd-Ag/C systems, an increased distance between neighboring Pd atoms (2.82–2.89 Å) in relation with monometallic Pd/C, where this distance is 2.72 Å, was observed. The higher activity of modified bimetallic systems is connected with increased number of active sites due to enhanced dispersity of supported palladium doped with second metal.

    LanguageEnglish
    Pages18-27
    Number of pages10
    JournalApplied Catalysis A: General
    Volume563
    DOIs
    Publication statusPublished - 5 Aug 2018

    Fingerprint

    Acetylene
    Hydrogenation
    Catalysts
    Ethylene
    Liquids
    Gallium
    X ray absorption spectroscopy
    Graphite
    Catalyst selectivity
    Palladium
    Silver
    Zinc
    Catalyst activity
    Carbon
    Metals
    Doping (additives)
    Transmission electron microscopy
    Atoms
    ethylene

    Keywords

    • Bimetallic catalysts
    • Carbonaceous support
    • Liquid-phase hydrogenation of acetylene
    • Metal-metal interaction
    • Palladium catalyst

    ASJC Scopus subject areas

    • Catalysis
    • Process Chemistry and Technology

    Cite this

    A study on structural features of bimetallic Pd-M/C (M : Zn, Ga, Ag) catalysts for liquid-phase selective hydrogenation of acetylene. / Glyzdova, Daria V.; Vedyagin, Aleksey A.; Tsapina, Anna M.; Kaichev, Vasily V.; Trigub, Alexander L.; Trenikhin, Mikhail V.; Shlyapin, Dmitry A.; Tsyrulnikov, Pavel G.; Lavrenov, Alexander V.

    In: Applied Catalysis A: General, Vol. 563, 05.08.2018, p. 18-27.

    Research output: Contribution to journalArticle

    Glyzdova, Daria V. ; Vedyagin, Aleksey A. ; Tsapina, Anna M. ; Kaichev, Vasily V. ; Trigub, Alexander L. ; Trenikhin, Mikhail V. ; Shlyapin, Dmitry A. ; Tsyrulnikov, Pavel G. ; Lavrenov, Alexander V. / A study on structural features of bimetallic Pd-M/C (M : Zn, Ga, Ag) catalysts for liquid-phase selective hydrogenation of acetylene. In: Applied Catalysis A: General. 2018 ; Vol. 563. pp. 18-27.
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    abstract = "The present work is devoted to the study of doping effects of zinc, gallium and silver on the structure of active sites and catalytic properties of carbon-supported 0.5 wt{\%} Pd catalysts in the liquid-phase selective hydrogenation of acetylene to ethylene. Carbonaceous graphite-like material Sibunit was used as a support. The reaction was performed in a medium of N-methyl-2-pyrrolidone at 55 °C. It was shown that the bimetallic Pd-Zn/C, Pd-Ga/C and Pd-Ag/C catalysts exhibit better activity and selectivity towards target product if compare with the monometallic Pd/C catalyst. The ethylene yield increases in a row as follows: Pd/C (19{\%}) < Pd-Ag/C (34{\%}) < Pd-Ga/C (42{\%}) < Pd-Zn/C (53{\%}). Using X-ray absorption spectroscopy and transmission electron microscopy it was found that an improvement of the selectivity is stipulated by the formation of bimetallic PdZn, PdxGay and PdAg nanophases. In the case of Pd-Zn/C and Pd-Ag/C systems, an increased distance between neighboring Pd atoms (2.82–2.89 {\AA}) in relation with monometallic Pd/C, where this distance is 2.72 {\AA}, was observed. The higher activity of modified bimetallic systems is connected with increased number of active sites due to enhanced dispersity of supported palladium doped with second metal.",
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    AU - Glyzdova, Daria V.

    AU - Vedyagin, Aleksey A.

    AU - Tsapina, Anna M.

    AU - Kaichev, Vasily V.

    AU - Trigub, Alexander L.

    AU - Trenikhin, Mikhail V.

    AU - Shlyapin, Dmitry A.

    AU - Tsyrulnikov, Pavel G.

    AU - Lavrenov, Alexander V.

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