The promoting effect of Ce on Ag/ZrO2 catalyst for the total oxidation of toluene into CO2 in the presence of water vapor - Institut Charles Gerhardt - Institut de Chimie Moléculaire et des Matériaux de Montpellier Accéder directement au contenu
Article Dans Une Revue Journal of Sol-Gel Science and Technology Année : 2023

The promoting effect of Ce on Ag/ZrO2 catalyst for the total oxidation of toluene into CO2 in the presence of water vapor

Résumé

The development of advanced catalysts to reduce volatile organic compounds (VOCs) is of significant environmental and economic importance. In this work, toluene was chosen as a representative of VOCs because of its high toxicity to human health. Silver-based catalysts Ag/ZrO 2 and Ag/Ce-ZrO 2 with 2 wt.% Ag and 10 wt. % Ce were prepared for the low temperature total oxidation of toluene (C 7 H 8) in the presence of water vapor. The effect of cerium species on physicochemical properties and catalytic activity in the toluene oxidation of mesoporous catalysts were investigated. The new Ag/Ce-ZrO 2 material possesses the highest catalytic activity in the total oxidation of toluene at low temperature in comparison to Ag/ZrO 2. 100% C 7 H 8 conversion to CO 2 is achieved between 300 and 550 °C. It reveals that the oxygen species presented in Ag/Ce-ZrO 2 are the key factor in toluene oxidation. Silver species increases the amount of surface lattice oxygen species and leads to the migration of lattice oxygen, which effectively facilitates the low-temperature conversion of toluene oxidation.
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Dates et versions

hal-04019269 , version 1 (08-03-2023)

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Rimeh Ismail, Jihène Arfaoui, Zouhaier Ksibi, Abdelhamid Ghorbel, Gérard Delahay. The promoting effect of Ce on Ag/ZrO2 catalyst for the total oxidation of toluene into CO2 in the presence of water vapor. Journal of Sol-Gel Science and Technology, 2023, 105 (3), pp.871-880. ⟨10.1007/s10971-023-06043-8⟩. ⟨hal-04019269⟩
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