Direct decomposition of NO into N2 and O2 over Ba3Y3.4Sc0.6O9

Kazuya Goto; Tatsumi Ishihara

doi:10.1016/j.apcata.2011.09.027

Direct decomposition of NO into N₂ and O₂ over Ba₃Y_3.4Sc_0.6O₉

Kazuya Goto, Tatsumi Ishihara

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20 Citations (Scopus)

Abstract

Effects of dopant on direct decomposition of nitric oxide (NO) over Ba ₃Y₄O₉ were investigated and it was found that Sc is partially substituted Ba₃Y_3.4Sc_0.6O ₉ catalyst shows a high NO decomposition activity (N₂ yield: 92%) at 1123 K among the examined dopants. Sc is considered to contribute to the stabilization of the Ba₃Y₄O₉ crystal phase and also form the intrinsic oxygen defects. This catalyst was active in NO decomposition in the presence of O₂ and maintained its high activity at high space velocity values. Fourier transform infrared spectroscopy (FT-IR) measurement suggests that initial adsorption state of NO is a bent-type NO ^-. Moreover, the rate-determining step for NO decomposition seems to be the coupling of the NO species adsorbed on the surface. Doping with Sc effectively weakened the adsorption of NO species, resulting in the increased reactivity. FT-IR and temporal analysis of products (TAP) measurements suggested that N₂O may be an intermediate species in NO decomposition.

Original language	English
Pages (from-to)	66-73
Number of pages	8
Journal	Applied Catalysis A: General
Volume	409-410
DOIs	https://doi.org/10.1016/j.apcata.2011.09.027
Publication status	Published - Dec 15 2011

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Catalysis
Process Chemistry and Technology

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10.1016/j.apcata.2011.09.027

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title = "Direct decomposition of NO into N2 and O2 over Ba3Y3.4Sc0.6O9",

abstract = "Effects of dopant on direct decomposition of nitric oxide (NO) over Ba 3Y4O9 were investigated and it was found that Sc is partially substituted Ba3Y3.4Sc0.6O 9 catalyst shows a high NO decomposition activity (N2 yield: 92%) at 1123 K among the examined dopants. Sc is considered to contribute to the stabilization of the Ba3Y4O9 crystal phase and also form the intrinsic oxygen defects. This catalyst was active in NO decomposition in the presence of O2 and maintained its high activity at high space velocity values. Fourier transform infrared spectroscopy (FT-IR) measurement suggests that initial adsorption state of NO is a bent-type NO -. Moreover, the rate-determining step for NO decomposition seems to be the coupling of the NO species adsorbed on the surface. Doping with Sc effectively weakened the adsorption of NO species, resulting in the increased reactivity. FT-IR and temporal analysis of products (TAP) measurements suggested that N2O may be an intermediate species in NO decomposition.",

author = "Kazuya Goto and Tatsumi Ishihara",

year = "2011",

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day = "15",

doi = "10.1016/j.apcata.2011.09.027",

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journal = "Applied Catalysis A: General",

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T1 - Direct decomposition of NO into N2 and O2 over Ba3Y3.4Sc0.6O9

AU - Goto, Kazuya

AU - Ishihara, Tatsumi

PY - 2011/12/15

Y1 - 2011/12/15

N2 - Effects of dopant on direct decomposition of nitric oxide (NO) over Ba 3Y4O9 were investigated and it was found that Sc is partially substituted Ba3Y3.4Sc0.6O 9 catalyst shows a high NO decomposition activity (N2 yield: 92%) at 1123 K among the examined dopants. Sc is considered to contribute to the stabilization of the Ba3Y4O9 crystal phase and also form the intrinsic oxygen defects. This catalyst was active in NO decomposition in the presence of O2 and maintained its high activity at high space velocity values. Fourier transform infrared spectroscopy (FT-IR) measurement suggests that initial adsorption state of NO is a bent-type NO -. Moreover, the rate-determining step for NO decomposition seems to be the coupling of the NO species adsorbed on the surface. Doping with Sc effectively weakened the adsorption of NO species, resulting in the increased reactivity. FT-IR and temporal analysis of products (TAP) measurements suggested that N2O may be an intermediate species in NO decomposition.

AB - Effects of dopant on direct decomposition of nitric oxide (NO) over Ba 3Y4O9 were investigated and it was found that Sc is partially substituted Ba3Y3.4Sc0.6O 9 catalyst shows a high NO decomposition activity (N2 yield: 92%) at 1123 K among the examined dopants. Sc is considered to contribute to the stabilization of the Ba3Y4O9 crystal phase and also form the intrinsic oxygen defects. This catalyst was active in NO decomposition in the presence of O2 and maintained its high activity at high space velocity values. Fourier transform infrared spectroscopy (FT-IR) measurement suggests that initial adsorption state of NO is a bent-type NO -. Moreover, the rate-determining step for NO decomposition seems to be the coupling of the NO species adsorbed on the surface. Doping with Sc effectively weakened the adsorption of NO species, resulting in the increased reactivity. FT-IR and temporal analysis of products (TAP) measurements suggested that N2O may be an intermediate species in NO decomposition.

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JF - Applied Catalysis A: General

ER -

Direct decomposition of NO into N₂ and O₂ over Ba₃Y_3.4Sc_0.6O₉

Abstract

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