Study of the Ru/Ce system in the oxidation of carbon black and volatile organic compounds

S. Aouad; E. Saab; E. Abi-Aad; A. Aboukaïs

doi:10.1134/S0023158407060122

Study of the Ru/Ce system in the oxidation of carbon black and volatile organic compounds

S. Aouad, E. Saab, E. Abi-Aad, A. Aboukaïs

Chemistry

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

Abstract

The relationship between the state of Ru on CeO₂ and catalytic activity in the oxidation of carbon black (CB) and some volatile organic compounds (VOCs) was investigated for Ru/CeO₂ catalysts prepared by wet impregnation. It was demonstrated that the addition of ruthenium to ceria significantly improved the reactivity of the latter. The temperature programmed reduction (TPR) experiments of Ru/CeO₂ showed that the oxygen species of RuO₂ was reduced at low temperatures. In addition, Electronic Paramagnetic Resonance (EPR) studies of outgassed samples at different temperatures showed an anisotropic signal indicating that Ru(IV) was reduced to intermediate valence states like Ru(III) before its total reduction to metallic Ru. It was concluded that Ru-O-Ce bonds in the well-dispersed Ru species are highly fragile and its mobile oxygen is the active species in the catalytic oxidation process.

Original language	English (US)
Pages (from-to)	835-840
Number of pages	6
Journal	Kinetics and Catalysis
Volume	48
Issue number	6
DOIs	https://doi.org/10.1134/S0023158407060122
State	Published - Nov 2007

ASJC Scopus subject areas

Catalysis
General Chemistry
Modeling and Simulation
Computer Science Applications

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title = "Study of the Ru/Ce system in the oxidation of carbon black and volatile organic compounds",

abstract = "The relationship between the state of Ru on CeO2 and catalytic activity in the oxidation of carbon black (CB) and some volatile organic compounds (VOCs) was investigated for Ru/CeO2 catalysts prepared by wet impregnation. It was demonstrated that the addition of ruthenium to ceria significantly improved the reactivity of the latter. The temperature programmed reduction (TPR) experiments of Ru/CeO2 showed that the oxygen species of RuO2 was reduced at low temperatures. In addition, Electronic Paramagnetic Resonance (EPR) studies of outgassed samples at different temperatures showed an anisotropic signal indicating that Ru(IV) was reduced to intermediate valence states like Ru(III) before its total reduction to metallic Ru. It was concluded that Ru-O-Ce bonds in the well-dispersed Ru species are highly fragile and its mobile oxygen is the active species in the catalytic oxidation process.",

author = "S. Aouad and E. Saab and E. Abi-Aad and A. Abouka{\"i}s",

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AU - Aouad, S.

AU - Saab, E.

AU - Abi-Aad, E.

AU - Aboukaïs, A.

PY - 2007/11

Y1 - 2007/11

N2 - The relationship between the state of Ru on CeO2 and catalytic activity in the oxidation of carbon black (CB) and some volatile organic compounds (VOCs) was investigated for Ru/CeO2 catalysts prepared by wet impregnation. It was demonstrated that the addition of ruthenium to ceria significantly improved the reactivity of the latter. The temperature programmed reduction (TPR) experiments of Ru/CeO2 showed that the oxygen species of RuO2 was reduced at low temperatures. In addition, Electronic Paramagnetic Resonance (EPR) studies of outgassed samples at different temperatures showed an anisotropic signal indicating that Ru(IV) was reduced to intermediate valence states like Ru(III) before its total reduction to metallic Ru. It was concluded that Ru-O-Ce bonds in the well-dispersed Ru species are highly fragile and its mobile oxygen is the active species in the catalytic oxidation process.

AB - The relationship between the state of Ru on CeO2 and catalytic activity in the oxidation of carbon black (CB) and some volatile organic compounds (VOCs) was investigated for Ru/CeO2 catalysts prepared by wet impregnation. It was demonstrated that the addition of ruthenium to ceria significantly improved the reactivity of the latter. The temperature programmed reduction (TPR) experiments of Ru/CeO2 showed that the oxygen species of RuO2 was reduced at low temperatures. In addition, Electronic Paramagnetic Resonance (EPR) studies of outgassed samples at different temperatures showed an anisotropic signal indicating that Ru(IV) was reduced to intermediate valence states like Ru(III) before its total reduction to metallic Ru. It was concluded that Ru-O-Ce bonds in the well-dispersed Ru species are highly fragile and its mobile oxygen is the active species in the catalytic oxidation process.

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Study of the Ru/Ce system in the oxidation of carbon black and volatile organic compounds

Abstract

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