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Article Dans Une Revue Catalysis Communications Année : 2023

Insight into the true role of hydrogen-carbonate species in CO oxidation over Pd/Al2O3 catalyst using SSITKA-transmission IR technique

Résumé

The powerful combination of steady state isotopic transient kinetic analysis (SSITKA) and operando infrared spectroscopy (IR) was applied to study the CO oxidation reaction on Pd-supported Al2O3 catalyst at low temperature. The aim was to reveal the true role of hydrogen‑carbonate species in the reaction mechanism. The SSITKA-IR experiments, conducted in presence and absence of CO2 in the gas feed, have confirmed that hydrogen‑carbonate species behave as spectator species in the reaction. Its formation was due to re-adsorption of the CO2 product itself on the alumina surface as confirmed by the direct 12CO2/13CO2 exchange observed on the bare support.

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Catalyse
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Dates et versions

hal-04146275 , version 1 (29-06-2023)

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Paternité - Pas d'utilisation commerciale - Pas de modification

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Ibrahim Hatoum, Mélissandre Richard, Christophe Dujardin. Insight into the true role of hydrogen-carbonate species in CO oxidation over Pd/Al2O3 catalyst using SSITKA-transmission IR technique. Catalysis Communications, 2023, Catalysis Communications, 179, pp.106684. ⟨10.1016/j.catcom.2023.106684⟩. ⟨hal-04146275⟩
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