Mesoporous Metal Catalysts Templated on Clay Nanotubes

DOI PDF 被引用文献20件 参考文献45件
  • Aleksandr Glotov
    Department of Physical and Colloid Chemistry, Gubkin Russian State University of Oil and Gas, 119991, Moscow , Russia
  • Anna Stavitskaya
    Department of Physical and Colloid Chemistry, Gubkin Russian State University of Oil and Gas, 119991, Moscow , Russia
  • Yaroslav Chudakov
    Department of Physical and Colloid Chemistry, Gubkin Russian State University of Oil and Gas, 119991, Moscow , Russia
  • Evgenii Ivanov
    Department of Physical and Colloid Chemistry, Gubkin Russian State University of Oil and Gas, 119991, Moscow , Russia
  • Wei Huang
    Laboratory of Coal Science and Technology, Taiyuan University of Technology, 030024, Taiyuan, P. R. China
  • Vladimir Vinokurov
    Department of Physical and Colloid Chemistry, Gubkin Russian State University of Oil and Gas, 119991, Moscow , Russia
  • Anna Zolotukhina
    Department of Petroleum Chemistry and Organic Catalysis, Moscow State University, 119991, Moscow , Russia
  • Anton Maximov
    Department of Petroleum Chemistry and Organic Catalysis, Moscow State University, 119991, Moscow , Russia
  • Eduard Karakhanov
    Department of Petroleum Chemistry and Organic Catalysis, Moscow State University, 119991, Moscow , Russia
  • Yuri Lvov
    Department of Physical and Colloid Chemistry, Gubkin Russian State University of Oil and Gas, 119991, Moscow , Russia

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<jats:title>Abstract</jats:title> <jats:p>Halloysite is a natural tubular aluminosilicate clay of ca. 50 nm diameter and 0.5–1.5 micrometers in length. The nanoarchitectural modification of halloysite inner/outer surfaces can be achieved through supramolecular and covalent interactions exploiting its different inside/outside chemistry (Al2O3/SiO2). The tubular morphology makes halloysite a prospective nanotemplate for core-shell structured mesoporous catalysts. Catalytic metals can be incorporated on the nanotubes’ outer surface or in the inner lumens with selective metal binding. 2–5 nm diameter Au, Ag, Pt, Pd, Co, Ru, Cu-Ni, Fe2O3, CoxBy, CdS, and CdxZn1−xS particles were templated on halloysite. In this work, CdS and Ru-containing halloysite based nanocatalysts were synthesized via modification with organic ligands and microwave-assisted wetness ion impregnation. The catalytic hydrogenation of benzene and its homologues as well as phenol was performed. The impacts of the core-shell architecture, the metal particle size and seeding density were optimized for high reaction efficiency. An efficient Co-halloysite catalyst was formed using azines as ligands, and it contained 16 wt. % of cobalt with hydrogen evolution rate of 3.0 L/min × g(cat). The mesocatalysts produced are based on a safe and cheap natural clay nanomaterial and may be scaled-up for industrial applications.</jats:p>

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