Reactivity and characterization of adsorbed oxygen on SrTi(1-x)Mg(x)O(3- δ) catalysts for oxidative coupling of methane

Keiichi Tomishige; Xiao Hong Li; Kaoru Fujimoto

doi:10.1039/A901578G

Reactivity and characterization of adsorbed oxygen on SrTi(1-x)Mg(x)O(3- δ) catalysts for oxidative coupling of methane

Keiichi Tomishige, Xiao Hong Li, Kaoru Fujimoto

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

8 Citations (Scopus)

Abstract

The reactivity of oxygen species adsorbed on SrTi(1-x)Mg(x)O(3-δ) catalysts with methane was investigated. Temperature programmed desorption of oxygen, temperature programmed surface reaction of methane, and electron spin resonance were used for the characterization of oxygen species. It is suggested that the adsorption site is formed by the substitution of Ti⁴⁺ in Sr-Ti perovskite-type oxides with added Mg²⁺. It was found that this oxygen species was able to convert methane to ethane at a temperature as low as 550 K. Without CO₂ on the surface, C₂ hydrocarbons were formed with high selectivity in the CH₄ + O₂ reaction. On the other hand, CO and CO₂ were formed on the catalyst with CO₂ pre-adsorption.

Original language	English
Pages (from-to)	3039-3045
Number of pages	7
Journal	Physical Chemistry Chemical Physics
Volume	1
Issue number	12
DOIs	https://doi.org/10.1039/A901578G
Publication status	Published - 1999 Jun 15
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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title = "Reactivity and characterization of adsorbed oxygen on SrTi(1-x)Mg(x)O(3- δ) catalysts for oxidative coupling of methane",

abstract = "The reactivity of oxygen species adsorbed on SrTi(1-x)Mg(x)O(3-δ) catalysts with methane was investigated. Temperature programmed desorption of oxygen, temperature programmed surface reaction of methane, and electron spin resonance were used for the characterization of oxygen species. It is suggested that the adsorption site is formed by the substitution of Ti4+ in Sr-Ti perovskite-type oxides with added Mg2+. It was found that this oxygen species was able to convert methane to ethane at a temperature as low as 550 K. Without CO2 on the surface, C2 hydrocarbons were formed with high selectivity in the CH4 + O2 reaction. On the other hand, CO and CO2 were formed on the catalyst with CO2 pre-adsorption.",

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T1 - Reactivity and characterization of adsorbed oxygen on SrTi(1-x)Mg(x)O(3- δ) catalysts for oxidative coupling of methane

AU - Tomishige, Keiichi

AU - Li, Xiao Hong

AU - Fujimoto, Kaoru

PY - 1999/6/15

Y1 - 1999/6/15

N2 - The reactivity of oxygen species adsorbed on SrTi(1-x)Mg(x)O(3-δ) catalysts with methane was investigated. Temperature programmed desorption of oxygen, temperature programmed surface reaction of methane, and electron spin resonance were used for the characterization of oxygen species. It is suggested that the adsorption site is formed by the substitution of Ti4+ in Sr-Ti perovskite-type oxides with added Mg2+. It was found that this oxygen species was able to convert methane to ethane at a temperature as low as 550 K. Without CO2 on the surface, C2 hydrocarbons were formed with high selectivity in the CH4 + O2 reaction. On the other hand, CO and CO2 were formed on the catalyst with CO2 pre-adsorption.

AB - The reactivity of oxygen species adsorbed on SrTi(1-x)Mg(x)O(3-δ) catalysts with methane was investigated. Temperature programmed desorption of oxygen, temperature programmed surface reaction of methane, and electron spin resonance were used for the characterization of oxygen species. It is suggested that the adsorption site is formed by the substitution of Ti4+ in Sr-Ti perovskite-type oxides with added Mg2+. It was found that this oxygen species was able to convert methane to ethane at a temperature as low as 550 K. Without CO2 on the surface, C2 hydrocarbons were formed with high selectivity in the CH4 + O2 reaction. On the other hand, CO and CO2 were formed on the catalyst with CO2 pre-adsorption.

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Reactivity and characterization of adsorbed oxygen on SrTi(1-x)Mg(x)O(3- δ) catalysts for oxidative coupling of methane

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