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首页> 外文期刊>RSC Advances >Environmentally benign selective hydrogenation of alpha, beta-unsaturated aldehydes and reduction of aromatic nitro compounds using Cu based bimetallic nanoparticles supported on multiwalled carbon nanotubes and mesoporous carbon
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Environmentally benign selective hydrogenation of alpha, beta-unsaturated aldehydes and reduction of aromatic nitro compounds using Cu based bimetallic nanoparticles supported on multiwalled carbon nanotubes and mesoporous carbon

机译：α，β-不饱和醛的环境良性选择性氢化和使用Cu基的双金属纳米颗粒在多壁碳纳米管和介孔碳上使用Cu基二核纳米颗粒进行芳香硝基化合物

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摘要

Bimetallic catalysts of Cu with Fe, Co, Ni, Zn or Ru supported on multiwalled carbon nanotubes (MWCNT) and mesoporous carbon (MC) were prepared by in situ reduction of CuCl2 and the metal chlorides using NaBH4. The catalytic activity of these materials was investigated in the hydrogenation of alpha, beta-unsaturated aldehydes and reduction of aromatic nitro compounds using different hydrogen sources. Cu-Ni and Cu-Ru supported on MWCNT catalysts were found to be better than MC supported catalysts in terms of yield of the expected product and recyclability. Among the different hydrogen sources used, molecular H-2 was found to be the best for the hydrogenation of alpha, beta-unsaturated aldehydes to corresponding alcohols (conversion 83-86%, selectivity 72-78%), whereas NaBH4 was the best for the reduction of aromatic nitro compounds to corresponding amines (conversion 100%, selectivity 98%). The reaction conditions were optimised for good yield and selectivity of the product. Generality of the catalysts was also investigated in the reduction of different alpha, beta-unsaturated aldehydes and aromatic nitro compounds. The relationship between catalytic activity and physico-chemical properties was investigated by characterising the catalytic materials using powder X-ray diffraction (powder XRD), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) surface area, scanning electron microscopy (SEM) energy dispersive X-ray spectroscopy (EDS) and transmission electron microscopy (TEM).
机译：通过使用NaBH4的CuCl 2和金属氯化物，通过使用NaBH4原位还原在多壁碳纳米管（MWCNT）和中孔碳（MC）上使用Fe，Co，Ni，Zn或Ru的Bimetallic催化剂。研究了这些材料的催化活性在α，β-不饱和醛和使用不同氢气源的芳族硝基化合物的氢化中进行研究。发现在MWCNT催化剂上负载的Cu-Ni和Cu-Ru在预期产物和可回收性的产率方面优于MC负载催化剂。在所使用的不同氢气源中，发现分子H-2是最适合于对应醇的α，β-不饱和醛的氢化（转化83-86％，选择性72-78％），而Nabh4是最好的将芳族硝基化合物的还原为相应的胺（转化100％，选择性98％）。反应条件优化了良好的产量和产品的选择性。还在还原不同α，β-不饱和醛和芳族硝基化合物的还原中研究了催化剂的一般性。通过使用粉末X射线衍射（粉末XRD），X射线光电子谱（XPS），Brunauer-Emmett-Teller（Bet）表面积，扫描电子来研究催化活性和物理化学性质之间的关系。显微镜（SEM）能量分散X射线光谱（EDS）和透射电子显微镜（TEM）。

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  • 来源
    《RSC Advances》 |2016年第85期|共11页
  • 作者

    Hareesh H. N.; Minchitha K. U.; Venkatesh K.; Nagaraju N.; Kathyayini N.;

  • 作者单位

    Ctr Incubat Innovat Res &

    Consultancy Tataguni Off Kanakapura Rd Bengaluru 560082 Karnataka India;

    Ctr Incubat Innovat Res &

    Consultancy Tataguni Off Kanakapura Rd Bengaluru 560082 Karnataka India;

    Ctr Incubat Innovat Res &

    Consultancy Tataguni Off Kanakapura Rd Bengaluru 560082 Karnataka India;

    St Josephs Coll PG Ctr Dept Chem 46 Langford Rd Bengaluru 560027 Karnataka India;

    Ctr Incubat Innovat Res &

    Consultancy Tataguni Off Kanakapura Rd Bengaluru 560082 Karnataka India;

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