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Topics in Catalysis

, Volume 50, Issue 1–4, pp 180–191 | Cite as

Characterization of K-Promoted Ru Catalysts for Ammonia Decomposition Discovered Using High-Throughput Experimentation

  • William Pyrz
  • Rohit Vijay
  • Jason Binz
  • Jochen Lauterbach
  • Douglas J. Buttrey
Original Paper

Abstract

We obtain H2 from low temperature NH3 decomposition using a new hollandite (KRu4O8) catalyst supported on γ-Al2O3 discovered using high-throughput experimentation and advanced TEM/SEM characterization. Relative to the base Ru° catalyst, this new catalyst shows NH3 conversion enhancements of 30–50% at T = 350 °C and decomposition activity at temperatures decreased by 50–100 °C. TEM analysis over the lifetime of the catalyst shows multiple phases and morphologies suggesting that the KRu4O8 behaves either as a new low-temperature decomposition catalyst or as a precursor to the active catalyst.

Keywords

NH3 decomposition KRu4O8 hollandite K-promoted Ru catalysts TEM SEM High-throughput experimentation 

Notes

Acknowledgments

We acknowledge many fruitful discussions with Elizabeth D’Addio, Hua Yang, and Professor Dion Vlachos. This work was supported by the U.S. Department of Energy, Grant #DE-FG02-06ER15795. WDP and DJB thank Chaoying Ni and Frank Kriss with the Keck Electron Microscopy Facility for EM assistance.

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • William Pyrz
    • 1
  • Rohit Vijay
    • 1
  • Jason Binz
    • 1
  • Jochen Lauterbach
    • 1
  • Douglas J. Buttrey
    • 1
  1. 1.Department of Chemical Engineering, Center for Catalytic Science and TechnologyUniversity of DelawareNewarkUSA

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