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Solid solution for catalytic ammonia synthesis from nitrogen and hydrogen gases at 50 °C

Author

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  • Masashi Hattori

    (Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku)

  • Shinya Iijima

    (Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku)

  • Takuya Nakao

    (Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku)

  • Hideo Hosono

    (Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku)

  • Michikazu Hara

    (Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku)

Abstract

The lack of efficient catalysts for ammonia synthesis from N2 and H2 gases at the lower temperature of ca. 50 °C has been a problem not only for the Haber–Bosch process, but also for ammonia production toward zero CO2 emissions. Here, we report a new approach for low temperature ammonia synthesis that uses a stable electron-donating heterogeneous catalyst, cubic CaFH, a solid solution of CaF2 and CaH2 formed at low temperatures. The catalyst produced ammonia from N2 and H2 gases at 50 °C with an extremely small activation energy of 20 kJ mol−1, which is less than half that for conventional catalysts reported. The catalytic performance can be attributed to the weak ionic bonds between Ca2+ and H− ions in the solid solution and the facile release of hydrogen atoms from H− sites.

Suggested Citation

  • Masashi Hattori & Shinya Iijima & Takuya Nakao & Hideo Hosono & Michikazu Hara, 2020. "Solid solution for catalytic ammonia synthesis from nitrogen and hydrogen gases at 50 °C," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15868-8
    DOI: 10.1038/s41467-020-15868-8
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    Cited by:

    1. Raza, Jehangeer & Khoja, Asif Hussain & Anwar, Mustafa & Saleem, Faisal & Naqvi, Salman Raza & Liaquat, Rabia & Hassan, Muhammad & Javaid, Rahat & Qazi, Umair Yaqub & Lumbers, Brock, 2022. "Methane decomposition for hydrogen production: A comprehensive review on catalyst selection and reactor systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 168(C).

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