Detection of adsorbed O2- species on CeO2 solid impregnated with Ag2+ ions during its thermal treatment under a H2 atmosphere, an EPR study

Mira Skaf; Sara Hany; Samer Aouad; Cédric Gennequin; Madona Labaki; Edmond Abi-Aad; Antoine Aboukaïs

doi:10.1039/c6cp05574e

Detection of adsorbed O₂^- species on CeO₂ solid impregnated with Ag²⁺ ions during its thermal treatment under a H₂ atmosphere, an EPR study

Mira Skaf, Sara Hany, Samer Aouad, Cédric Gennequin, Madona Labaki, Edmond Abi-Aad, Antoine Aboukaïs

Chemistry

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

Abstract

10% Ag/CeO₂ solid was prepared by the impregnation method. When the solid is calcined at 400 °C, three types of Ag²⁺ species are formed. One of them is more thermally stable compared to the others. The adsorption on the solid of O₂ or H₂ molecules gives an adsorbed O₂^- species on the surface, detected by electron paramagnetic resonance (EPR). The mobility of oxygen in CeO₂ and the nature of cations loaded on this support can be the origin of the adsorbed O₂^- species particularly when the solid is treated under H₂ molecules.

Original language	English (US)
Pages (from-to)	29381-29386
Number of pages	6
Journal	Physical Chemistry Chemical Physics
Volume	18
Issue number	42
DOIs	https://doi.org/10.1039/c6cp05574e
State	Published - 2016

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "Detection of adsorbed O2- species on CeO2 solid impregnated with Ag2+ ions during its thermal treatment under a H2 atmosphere, an EPR study",

abstract = "10% Ag/CeO2 solid was prepared by the impregnation method. When the solid is calcined at 400 °C, three types of Ag2+ species are formed. One of them is more thermally stable compared to the others. The adsorption on the solid of O2 or H2 molecules gives an adsorbed O2- species on the surface, detected by electron paramagnetic resonance (EPR). The mobility of oxygen in CeO2 and the nature of cations loaded on this support can be the origin of the adsorbed O2- species particularly when the solid is treated under H2 molecules.",

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T1 - Detection of adsorbed O2- species on CeO2 solid impregnated with Ag2+ ions during its thermal treatment under a H2 atmosphere, an EPR study

AU - Skaf, Mira

AU - Hany, Sara

AU - Aouad, Samer

AU - Gennequin, Cédric

AU - Labaki, Madona

AU - Abi-Aad, Edmond

AU - Aboukaïs, Antoine

N1 - Publisher Copyright: © the Owner Societies 2016.

PY - 2016

Y1 - 2016

N2 - 10% Ag/CeO2 solid was prepared by the impregnation method. When the solid is calcined at 400 °C, three types of Ag2+ species are formed. One of them is more thermally stable compared to the others. The adsorption on the solid of O2 or H2 molecules gives an adsorbed O2- species on the surface, detected by electron paramagnetic resonance (EPR). The mobility of oxygen in CeO2 and the nature of cations loaded on this support can be the origin of the adsorbed O2- species particularly when the solid is treated under H2 molecules.

AB - 10% Ag/CeO2 solid was prepared by the impregnation method. When the solid is calcined at 400 °C, three types of Ag2+ species are formed. One of them is more thermally stable compared to the others. The adsorption on the solid of O2 or H2 molecules gives an adsorbed O2- species on the surface, detected by electron paramagnetic resonance (EPR). The mobility of oxygen in CeO2 and the nature of cations loaded on this support can be the origin of the adsorbed O2- species particularly when the solid is treated under H2 molecules.

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Detection of adsorbed O₂^- species on CeO₂ solid impregnated with Ag²⁺ ions during its thermal treatment under a H₂ atmosphere, an EPR study

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