物理化学学报 >> 2014, Vol. 30 >> Issue (1): 129-134.doi: 10.3866/PKU.WHXB201311201

催化和表面科学 上一篇    下一篇

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

梁倩, 赵震, 刘坚, 韦岳长, 姜桂元, 段爱军   

  1. 中国石油大学(北京)重质油国家重点实验室, 北京 102249
  • 收稿日期:2013-08-26 修回日期:2013-11-20 发布日期:2014-01-01
  • 通讯作者: 赵震,刘坚 E-mail:zhenzhao@cup.edu.cn;liujian@cup.edu.cn
  • 基金资助:

    国家自然科学基金(21073235,21173270,21177160)及国家高技术研究发展计划(863) (2013AA061902)资助项目

Pd Nanoparticles Deposited on Metal-Organic Framework of MIL-53(Al):an Active Catalyst for CO Oxidation

LIANG Qian, ZHAO Zhen, LIU Jian, WEI Yue-Chang, JIANG Gui-Yuan, DUAN Ai-Jun   

  1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, P. R. China
  • Received:2013-08-26 Revised:2013-11-20 Published:2014-01-01
  • Contact: ZHAO Zhen, LIU Jian E-mail:zhenzhao@cup.edu.cn;liujian@cup.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21073235, 21173270, 21177160) and National High-Tech Research and Development Program of China (863) (2013AA061902).

摘要:

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.

关键词: 金属有机骨架材料, MIL-53(Al), 纳米Pd颗粒, 多相催化, CO氧化

Abstract:

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.

Key words: Metal-organic framework, MIL-53(Al), Palladium nanoparticle, Heterogeneous catalysis, CO oxidation

MSC2000: 

  • O643