孙璠.镁铝复合金属氧化物负载纳米Pd催化剂的制备及其在醇胺一步合成亚胺反应中的应用[J].分子催化,2014,(5):410-417
镁铝复合金属氧化物负载纳米Pd催化剂的制备及其在醇胺一步合成亚胺反应中的应用
Preparation of Pd Nanoparticles Supported on Mg-Al Mixed Metal Oxide Catalysts for One-pot Synthesis Imine from Alcohol and Primary Amine
投稿时间:2014-02-28  修订日期:2014-05-13
DOI:
中文关键词:  Pd纳米颗粒  镁铝水滑石  多相催化  N-苄叉苯胺
英文关键词:Pd nanoparticle  Mg-Al-hydrotalcite  heterogeneous catalysis  N-benzylideneaniline
基金项目:
作者单位E-mail
孙璠* 兰州化物所 sofia009@126.com 
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中文摘要:
      以共沉淀法制备的Pd2 掺杂水滑石为前驱体,通过焙烧、还原得到了镁铝复合金属氧化物负载纳米Pd催化剂。利用X射线粉末衍射(XRD),X射线光电子能谱(XPS),场发射透射电子显微镜(TEM)等手段对催化剂进行表征,发现通过Pd2 掺杂水滑石为前驱体制备的复合金属氧化物负载纳米Pd催化剂,可以实现Pd纳米颗粒(3.6 nm)在镁铝复合氧化物表面的均匀分散。该催化剂在催化苯甲醇和苯胺一步法合成N-苄叉苯胺时,在温和的反应条件下表现出良好的催化性能以及对N-苄叉苯胺较高的选择性,产物收率>99%。在循环实验过程中,催化剂表现出较好的稳定性,并且中催化活性未见下降。
英文摘要:
      The palladium nanoparticles supported on the Mg-Al mixed metal oxide catalysts were prepared by co-precipation. X-ray powder diffraction (XRD), X-ray photoelectron spectrometer (XPS), Transmission electron microscope (TEM), etc. were used to characterize the materials, and the results indicated that the palladium nanoparticles with small particle size (3.5 nm) were homogeneous dispersed on the surface of the supports. The catalysts exhibited high catalytic performance and selectivity in one-pot synthesis of N-benzylideneaniline from benzyl alcohol and aniline under the optimized conditions. The recycle experiments revealed that the obvious losses of conversion and selectivity were not observed, and the supported Pd nanoparticle catalysts showed high stability.
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