Ag/ZrO2 and Ag/Fe–ZrO2 catalysts for the low temperature total oxidation of toluene in the presence of water vapor

Rimeh Ismail (1) , Jihene Arfaoui (1) , Zouhaier Ksibi (1) , Abdelhamid Ghorbel (1) , Gerard Delahay (2)

1 UTM - Université de Tunis El Manar
2 ICGM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier

New mesoporous and well-structured Ag-based catalysts (xAg/ZrO2 and xAg/Fe–ZrO2 with x = 2 wt%) have been investigated in the total oxidation of toluene with water vapor. The results showed that the catalytic activity of systems increases, in the 350–550 °C temperature range, following this order: ZrO2 < Fe–ZrO2 < Ag/ZrO2 ≈ Ag/Fe–ZrO2. Nevertheless, it was revealed that Ag/Fe–ZrO2 is the most active solid for the low temperature total oxidation of toluene (< 350 °C). The highest low temperature activity of this new catalyst can be related to the presence of more reactive surface oxygen, new active redox and acidic sites at Ag/Fe–ZrO2 surface, most probably generated by the simultaneous presence of Ag and Fe species.

Mots clés: Aerogel supports; Ag/ZrO2; Ag/Fe-ZrO2; Toluene oxidation; Water vapor

Domaines: Catalyse

Rimeh Ismail, Jihene Arfaoui, Zouhaier Ksibi, Abdelhamid Ghorbel, Gerard Delahay. Ag/ZrO2 and Ag/Fe–ZrO2 catalysts for the low temperature total oxidation of toluene in the presence of water vapor. Transition Metal Chemistry, 2020, 45 (7), pp.501-509. ⟨10.1007/s11243-020-00402-y⟩. ⟨hal-02954522⟩