Molybdenum nitride for the direct decomposition of NO

H. He; H. X. Dai; K. Y. Ngan; C. T. Au

doi:10.1023/A:1009067507802

Molybdenum nitride for the direct decomposition of NO

H. He, H. X. Dai, K. Y. Ngan, C. T. Au^*

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

27 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 Mo₂O_xN_y 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, Mo₂O_xN_y 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 language	English
Pages (from-to)	147-153
Number of pages	7
Journal	Catalysis Letters
Volume	71
Issue number	3-4
DOIs	https://doi.org/10.1023/A:1009067507802
Publication status	Published - Feb 2001

Scopus Subject Areas

Catalysis
General Chemistry

User-Defined Keywords

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

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title = "Molybdenum nitride for the direct decomposition of NO",

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.",

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author = "H. He and Dai, {H. X.} and Ngan, {K. Y.} and Au, {C. T.}",

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T1 - Molybdenum nitride for the direct decomposition of NO

AU - He, H.

AU - Dai, H. X.

AU - Ngan, K. Y.

AU - Au, C. T.

PY - 2001/2

Y1 - 2001/2

N2 - 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.

AB - 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.

KW - γ-mon catalyst

KW - Isotope no pulse

KW - Moon

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KW - Oxygen storage

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EP - 153

JO - Catalysis Letters

JF - Catalysis Letters

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ER -

Molybdenum nitride for the direct decomposition of NO

Abstract

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