Insight into the true role of hydrogen‑carbonate species in CO oxidation over Pd/Al2O3 catalyst using SSITKA-transmission IR technique
Catalysis Communications(2023)
摘要
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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关键词
pd/al2o3 catalyst,co oxidation,ssitka-transmission
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