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

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. aim reveal true role hydrogen‑carbonate species in mechanism. SSITKA-IR experiments, conducted presence absence CO2 gas feed, have confirmed that behave as spectator reaction. Its formation due re-adsorption product itself alumina surface by direct 12CO2/13CO2 exchange observed bare support.