Citation: LIANG Qian, ZHAO Zhen, LIU Jian, WEI Yue-Chang, JIANG Gui-Yuan, DUAN Ai-Jun. Pd Nanoparticles Deposited on Metal-Organic Framework of MIL-53(Al):an Active Catalyst for CO Oxidation[J]. Acta Physico-Chimica Sinica, 2014, 30(1): 129-134. doi: 10.3866/PKU.WHXB201311201
金属有机骨架材料MIL-53(Al)负载纳米Pd颗粒:一种CO氧化的活性催化剂
通过等体积浸渍法制备了金属有机骨架材料MIL-53(Al) (MIL:Materials of Institut Lavoisier)负载纳米Pd催化剂. 采用X射线衍射(XRD)、透射电子显微镜(TEM)和X射线光电子能谱(XPS)等手段对催化剂的结构进行了表征. 催化剂在反应前后XRD衍射峰保持不变,说明载体MIL-53(Al)具有良好的稳定性. 采用TEM对催化剂进行表征,结果表明,MIL-53(Al)的多孔晶体结构有助于形成高度分散的纳米Pd颗粒,样品2.7% (w) Pd/MIL-53 中Pd颗粒的平均粒径为2.21 nm. 该催化剂在CO氧化反应中表现出较高的催化活性,115 ℃达到完全转化. 同时催化剂可循环使用,多次反应后催化活性和催化剂结构都保持稳定.
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关键词:
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金属有机骨架材料
- / MIL-53(Al)
- / 纳米Pd颗粒
- / 多相催化
- / CO氧化
English
Pd Nanoparticles Deposited on Metal-Organic Framework of MIL-53(Al):an Active Catalyst for CO Oxidation
Pd nanoparticles (NPs) supported on a metal-organic framework (MOF), MIL-53(Al) (MIL: Materials of Institut Lavoisier), were prepared using the incipient wetness impregnation method. The structures of the synthesized Pd/MIL-53(Al) catalysts were determined using X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The same peaks were observed in the XRD patterns of Pd/MIL-53(Al) before and after the catalytic reaction, confirming that the integrity of the MIL-53(Al) support was maintained. The TEM results indicated that the crystalline porous structure of MIL-53(Al) favored the formation of highly dispersed Pd NPs of average size 2.21 nm. The heterogeneous catalytic composite materials exhibited high activities for CO oxidation, with full conversion at 115 ℃. The catalytic activity and structure of Pd/MIL-53(Al) were stable after several reaction runs.
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Key words:
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Metal-organic framework
- / MIL-53(Al)
- / Palladium nanoparticle
- / Heterogeneous catalysis
- / CO oxidation
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