Mechanism of N2O decomposition over a Rh black catalyst studied by a tracer method. The reaction of N2O with 18O(a)

Shin ichi Tanaka; Koichi Yuzaki; Shin ichi Ito; Hiroshi Uetsuka; Satoshi Kameoka; Kimio Kunimori

doi:10.1016/S0920-5861(00)00486-7

Mechanism of N₂O decomposition over a Rh black catalyst studied by a tracer method. The reaction of N₂O with ¹⁸O(a)

Shin ichi Tanaka, Koichi Yuzaki, Shin ichi Ito, Hiroshi Uetsuka, Satoshi Kameoka, Kimio Kunimori

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

N₂O decomposition on an unsupported Rh catalyst has been studied using tracer technique in order to reveal the reaction mechanism. N₂¹⁶O was pulsed onto ¹⁸O/oxidized Rh catalyst at 220 °C and desorbed O₂ molecules (m/e = 32, 34, 36) were monitored by means of mass spectrometer. The ¹⁸O fraction in the desorbed dioxygen was the same value as that on the surface oxygen. The result shows that the O₂ molecules desorb via Langmuir-Hinshelwood mechanism, i.e., the desorption of dioxygen through the recombination of adsorbed oxygen. On the other hand, TPD measurements in He showed that desorption of oxygen from the Rh black catalyst occurred at the higher temperatures. Therefore, reaction-assisted desorption of oxygen during N₂O decomposition reaction at the low temperature was proposed.

Original language	English
Pages (from-to)	413-418
Number of pages	6
Journal	Catalysis Today
Volume	63
Issue number	2-4
DOIs	https://doi.org/10.1016/S0920-5861(00)00486-7
Publication status	Published - 2000 Dec 25
Externally published	Yes

ASJC Scopus subject areas

Catalysis
Chemistry(all)

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10.1016/S0920-5861(00)00486-7

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title = "Mechanism of N2O decomposition over a Rh black catalyst studied by a tracer method. The reaction of N2O with 18O(a)",

abstract = "N2O decomposition on an unsupported Rh catalyst has been studied using tracer technique in order to reveal the reaction mechanism. N216O was pulsed onto 18O/oxidized Rh catalyst at 220 °C and desorbed O2 molecules (m/e = 32, 34, 36) were monitored by means of mass spectrometer. The 18O fraction in the desorbed dioxygen was the same value as that on the surface oxygen. The result shows that the O2 molecules desorb via Langmuir-Hinshelwood mechanism, i.e., the desorption of dioxygen through the recombination of adsorbed oxygen. On the other hand, TPD measurements in He showed that desorption of oxygen from the Rh black catalyst occurred at the higher temperatures. Therefore, reaction-assisted desorption of oxygen during N2O decomposition reaction at the low temperature was proposed.",

author = "Tanaka, {Shin ichi} and Koichi Yuzaki and Ito, {Shin ichi} and Hiroshi Uetsuka and Satoshi Kameoka and Kimio Kunimori",

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T1 - Mechanism of N2O decomposition over a Rh black catalyst studied by a tracer method. The reaction of N2O with 18O(a)

AU - Tanaka, Shin ichi

AU - Yuzaki, Koichi

AU - Ito, Shin ichi

AU - Uetsuka, Hiroshi

AU - Kameoka, Satoshi

AU - Kunimori, Kimio

PY - 2000/12/25

Y1 - 2000/12/25

N2 - N2O decomposition on an unsupported Rh catalyst has been studied using tracer technique in order to reveal the reaction mechanism. N216O was pulsed onto 18O/oxidized Rh catalyst at 220 °C and desorbed O2 molecules (m/e = 32, 34, 36) were monitored by means of mass spectrometer. The 18O fraction in the desorbed dioxygen was the same value as that on the surface oxygen. The result shows that the O2 molecules desorb via Langmuir-Hinshelwood mechanism, i.e., the desorption of dioxygen through the recombination of adsorbed oxygen. On the other hand, TPD measurements in He showed that desorption of oxygen from the Rh black catalyst occurred at the higher temperatures. Therefore, reaction-assisted desorption of oxygen during N2O decomposition reaction at the low temperature was proposed.

AB - N2O decomposition on an unsupported Rh catalyst has been studied using tracer technique in order to reveal the reaction mechanism. N216O was pulsed onto 18O/oxidized Rh catalyst at 220 °C and desorbed O2 molecules (m/e = 32, 34, 36) were monitored by means of mass spectrometer. The 18O fraction in the desorbed dioxygen was the same value as that on the surface oxygen. The result shows that the O2 molecules desorb via Langmuir-Hinshelwood mechanism, i.e., the desorption of dioxygen through the recombination of adsorbed oxygen. On the other hand, TPD measurements in He showed that desorption of oxygen from the Rh black catalyst occurred at the higher temperatures. Therefore, reaction-assisted desorption of oxygen during N2O decomposition reaction at the low temperature was proposed.

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Mechanism of N₂O decomposition over a Rh black catalyst studied by a tracer method. The reaction of N₂O with ¹⁸O(a)

Abstract

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