Molybdenum nitride for the direct decomposition of NO

H. He, H. X. Dai, K. Y. Ngan, Chak Tong AU*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

The physico-chemical properties of passivated γ-Mo2N have been investigated. The material showed high activities for NO direct decomposition: nearly 100% NO conversion and 95 N2 selectivity were achieved at 450°C. The amount of O2 taken up by γ-Mo2N increased with temperature rise and reached 3133.9 μmol g-1 at 450°C; we conclude that formation of Mo2OxNy occurred. This oxygen-saturated γ-Mo2N material was calalytically active: NO conversion and N2 selectivity were 89 and 92% at 450°C. We found that by means of H2 reduction at 450°C, Mo2OxNy could be reduced back to γ-Mo2N and the oxidation/reduction cycle is repeatable; such a behaviour and the high oxygen capacity (3133.9 μmol g-1) of γ-Mo2N suggest that γ-Mo2N is a promising catalytic material for automobile exhaust purification.

Original languageEnglish
Pages (from-to)147-153
Number of pages7
JournalCatalysis Letters
Volume71
Issue number3-4
DOIs
Publication statusPublished - Feb 2001

Scopus Subject Areas

  • Catalysis
  • Chemistry(all)

User-Defined Keywords

  • γ-mon catalyst
  • Isotope no pulse
  • Moon
  • No decomposition
  • Oxygen storage

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