1,5-Dinitronaphthalene hydrogenation to 1,5-diaminonaphthalene over carbon nanotube supported non-noble metal catalysts under mild conditions

1,5-Dinitronaphthalene hydrogenation to 1,5-diaminonaphthalene over carbon nanotube supported non-noble metal catalysts under mild conditions
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碳纳米管负载非贵金属催化剂温和条件下1,5-二硝基萘加氢生成1,5-二氨基萘

DOI:
10.1016/j.apcata.2016.01.018
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发表时间:
2016-03
影响因子:
5.5
通讯作者:
Luo, He-An
Luo, He-An
中科院分区:
化学2区
文献类型:
--
作者:
Hao, Fang;Xiao, Han-Yan;Liu, Ping-Le;Luo, He-An

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首先对碳纳米管进行热处理,然后在硝酸或HNO_3/H_2SO_4混合物中对碳纳米管进行酸处理。将处理后的碳纳米管作为载体负载镍制备非贵金属加氢催化剂。对这些催化剂进行了表征,并将其用于1,5-二硝基苯加氢反应。表征结果表明,酸性修饰的碳纳米管不仅通过引入各种含氧官能团使其表面具有更强的亲水性,而且提高了镍的分散性、吸氢量和金属表面积。结果表明,在温和的反应条件下,Ni/CNTs-4催化剂对1,5-二硝基萘加氢反应表现出良好的催化活性,在0.6℃和393K下,1,5-二硝基萘的转化率为100%,1,5-二氨基萘的选择性为92.04%。讨论了反应条件和金属负载量的影响,提出了1,5-二硝基苯加氢的可能反应路线。这种非贵金属加氢催化剂有望在工业上取代现有的负载型钯或铂贵金属催化剂。
Carbon nanotubes (CNTs) were firstly thermal treated and then acid treated in HNO3or mixture of HNO3and H2SO4. The treated carbon nanotubes were used as support to load nickel to prepare non-noble metal hydrogenation catalysts. These catalysts were characterized and applied in 1,5-dinitronaphthalene hydrogenation. The characterization results indicate that acid modified carbon nanotubes not only possess a more hydrophilic surface by introducing a variety of oxygen-containing functional groups, but also improve the nickel dispersion, hydrogen uptake quantity and metallic surface area. The Ni/CNTs catalysts show good catalytic activity in 1,5-dinitronaphthalene hydrogenation under mild reaction conditions, and the Ni/CNTs-4 gives the best result of 100% conversion of 1,5-dinitronaphthalene and 92.04% selectivity to 1,5-diaminonaphthalene under 0.6 MPa and 393 K. The influences of reaction conditions and metal loading amount are discussed, and a possible reaction routes of 1,5-dinitronaphthalene hydrogenation is proposed. Such non-noble metal hydrogenation catalysts are expected to replace the present supported palladium or platinum noble catalysts in industry.
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