金属有机骨架材料负载镍纳米颗粒催化硝基苯加氢
以MIL-53(Al)、MIL-96(Al)和MIL-120(Al)(MIL:Material Institute of Lavorisier)三种金属有机骨架材料为载体,采用浸渍法制备了负载廉价金属镍纳米颗粒的催化剂.将其用于催化硝基苯加氢合成苯胺反应,发现以MIL-53(Al)为载体制得的催化剂表现出优异的催化性能.采用不同的镍前驱体,如硝酸镍、醋酸镍、乙二胺合镍,制备了一系列Ni/MIL-53(Al)催化剂.通过X射线衍射、傅里叶变换红外光谱、电感耦合等离子体、N2物理吸附、H2程序升温还原、透射电镜等技术对其进行了表征,研究了镍前驱体对金属-载体相互作用、镍颗粒尺寸以及分散程度的影响....
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Published in | 物理化学学报 Vol. 31; no. 1; pp. 137 - 144 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
大连理工大学化工学院,精细化工国家重点实验室,辽宁 大连 116024
2015
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Subjects | |
Online Access | Get full text |
ISSN | 1000-6818 |
DOI | 10.3866/PKU.WHXB201411171 |
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Summary: | 以MIL-53(Al)、MIL-96(Al)和MIL-120(Al)(MIL:Material Institute of Lavorisier)三种金属有机骨架材料为载体,采用浸渍法制备了负载廉价金属镍纳米颗粒的催化剂.将其用于催化硝基苯加氢合成苯胺反应,发现以MIL-53(Al)为载体制得的催化剂表现出优异的催化性能.采用不同的镍前驱体,如硝酸镍、醋酸镍、乙二胺合镍,制备了一系列Ni/MIL-53(Al)催化剂.通过X射线衍射、傅里叶变换红外光谱、电感耦合等离子体、N2物理吸附、H2程序升温还原、透射电镜等技术对其进行了表征,研究了镍前驱体对金属-载体相互作用、镍颗粒尺寸以及分散程度的影响.结果表明:以乙二胺合镍为镍前驱体制得的催化剂具有金属-载体相互作用适中、镍纳米颗粒更小(4-5 nm)和分布更均匀的特点,在硝基苯加氢反应中表现出优异的催化性能,硝基苯转化率达到100%.回收重复使用5次后,此催化剂仍保持催化活性,硝基苯转化率达92%. |
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Bibliography: | 11-1892/06 The metal-organic frameworks (MOFs), MIL-53(AI), MIL-96(AI), and MIL-120(AI) (MIL: Material Institute of Lavorisier) were synthesized and used as supports, to incorporate low-cost Ni nanoparticles (NPs) by wet impregnation. The samples were used as catalysts in the hydrogenation of nitrobenzene to aniline. The catalyst prepared with MIL-53(AI) as a support exhibited excellent catalytic performance. Ni/MIL-53(AI) heterogeneous catalysts were prepared using nickel nitrate, nickel acetate, and nickel ethanediamine as precursors. Characterization by powder X-ray diffraction, Fourier-transform infrared spectroscopy, inductively coupled plasma spectroscopy, N2 sorption measurements, H2-temperature programmed reduction, and transmission electron microscopy showed that the Ni precursor affected the metal-support interaction, Ni particle size and particle distribution. The catalyst prepared using nickel ethanediamine possessed moderate metal- support interactions, smaller Ni nanoparticles (4-5 nm), and a hig |
ISSN: | 1000-6818 |
DOI: | 10.3866/PKU.WHXB201411171 |