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Nano Research

, Volume 11, Issue 9, pp 4774–4785 | Cite as

Sub-nm ruthenium cluster as an efficient and robust catalyst for decomposition and synthesis of ammonia: Break the “size shackles”

  • Jinpeng Li
  • Weiyang Wang
  • Wenxing Chen
  • Qinmei Gong
  • Jun Luo
  • Ruoqian Lin
  • Huolin Xin
  • Hui Zhang
  • Dingsheng Wang
  • Qing Peng
  • Wei Zhu
  • Chen Chen
  • Yadong Li
Research Article
  • 214 Downloads

Abstract

Downsizing to sub-nm is a general strategy to reduce the cost of catalysts. However, theoretical Wulff-constructed model suggests that sub-nm clusters show little activity for various reactions such as ammonia decomposition and ammonia synthesis because of the lack of active sites. As clusters may deviate from the ideal model construction under reaction conditions, a host–guest strategy to synthesize thermally stable 1.0 nm monodispersed Ru clusters by the pyrolysis of MIL-101 hosts is reported here to verify the hypothesis. For ammonia decomposition, the activity of the Ru clusters is 25 times higher than that of commercial Ru/active carbon (AC) at full-conversion temperature, while for ammonia synthesis, the activity of the Ru clusters is 500 times as high as that of promoted Ru NPs counterpart. The catalyst also maintains its activities for 40 h without any increase in the size. This model can be used to develop a host–guest strategy for designing thermally stable sub-nm clusters to atomic–efficiently catalyze reactions.

Keywords

sub-nm Ru cluster synthesis design ammonia decomposition ammonia synthesis metal-organic frameworks 

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Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 21521091, 21131004, 21390393, U1463202, 21573119, 21590792, and 21406184). We also thank the Shanghai Synchrotron Radiation Facility (No. BL14W1) for providing beam time.

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Sub-nm ruthenium cluster as an efficient and robust catalyst for decomposition and synthesis of ammonia: Break the “size shackles”

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Copyright information

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Jinpeng Li
    • 1
  • Weiyang Wang
    • 1
  • Wenxing Chen
    • 1
  • Qinmei Gong
    • 2
  • Jun Luo
    • 3
  • Ruoqian Lin
    • 4
  • Huolin Xin
    • 4
  • Hui Zhang
    • 2
  • Dingsheng Wang
    • 1
  • Qing Peng
    • 1
  • Wei Zhu
    • 1
  • Chen Chen
    • 1
  • Yadong Li
    • 1
  1. 1.Department of ChemistryTsinghua UniversityBeijingChina
  2. 2.The Center of New Energy Materials and Technology, College of Chemistry and Chemical EngineeringSouthwest Petroleum UniversityChengduChina
  3. 3.Center for Electron MicroscopyTianjin University of TechnologyTianjinChina
  4. 4.Center for Functional NanomaterialsBrookhaven National LaboratoryUptonUSA

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