Zr-based Laves phases with nitride/hydride ions for ammonia synthesis

Yu Cao, Zefeng Wei, Walid Al Maksoud, Rohit Rai, Yoji Kobayashi*, Hiroshi Kageyama*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Early transition metal-based intermetallic compounds, such as ZrV2, ZrMn2, and ZrCr2, can reversibly absorb large amounts of hydrogen and are of great interest for hydrogen storage. The dissociative hydrogen chemisorption can proceed easily on the surface, allowing the rapid formation of intermetallic hydrides. In this study, we present the results of initial NH3 activity tests conducted on various Zr-based AB2-type intermetallic compounds, free of precious transition metals and rare earth metals. A dissociative hydrogen chemisorption together with nitrogen storage proceeds on AB2-type Laves phase intermetallic compounds accompanied by a lattice expansion. The formed intermetallic nitride hydride ZrCr2N0.4H1.4 exhibits stable catalytic activity as an ammonia synthesis catalyst.

Original languageEnglish (US)
Article number107331
JournalSolid State Sciences
StatePublished - Nov 2023

Bibliographical note

Publisher Copyright:
© 2023 Elsevier Masson SAS


  • Ammonia synthesis catalysis
  • Hydrides
  • Intermetallic compounds
  • Laves phase
  • Mixed anions
  • Nitrides

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics


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