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<p>It has been shown that the thermal decomposition of Co(II) oxalate in a hydrogen atmosphere leads to a mixture of cobalt nanoparticles of hexagonal and cubic modification. The decomposition of heterometallic oxalates obtained as a result of partial substitution of Co(II) by Mg(II) or Mn(II) causes a significant decrease in the average size of the formed Co nanoparticles and an increase in the content of its cubic modification. In the hydrogenation of quinoline on Co and Co-Mg catalysts, a higher yield of 1,2,3,4-tetrahydroquinoline is achieved with an increase of the hexagonal cobalt modification content. In the case of Co-Mn systems, a high yield of 1,2,3,4-tetrahydroquinoline is observed when the content of cubic Co modification is prevailing, which is explained by the promoting effect of Mn.</p>

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Influence of Phase Composition and Morphology of Cobalt Nanoparticles on the Process of Catalytic Hydrogenation of Quinoline

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • M. I. Arabadzhy,
  • S. V. Gryn,
  • A. S. Poturai,
  • A. I. Frolov,
  • S. A. Alekseev,
  • E. M. Ostapchuk,
  • V. V. Buryanov,
  • S. V. Kolotilov

摘要

It has been shown that the thermal decomposition of Co(II) oxalate in a hydrogen atmosphere leads to a mixture of cobalt nanoparticles of hexagonal and cubic modification. The decomposition of heterometallic oxalates obtained as a result of partial substitution of Co(II) by Mg(II) or Mn(II) causes a significant decrease in the average size of the formed Co nanoparticles and an increase in the content of its cubic modification. In the hydrogenation of quinoline on Co and Co-Mg catalysts, a higher yield of 1,2,3,4-tetrahydroquinoline is achieved with an increase of the hexagonal cobalt modification content. In the case of Co-Mn systems, a high yield of 1,2,3,4-tetrahydroquinoline is observed when the content of cubic Co modification is prevailing, which is explained by the promoting effect of Mn.