A Bifunctional Pt/CeO2-Cu1/CeO2 Catalyst System for Isooctane Oxidation under Fully Simulated Engine-Exhaust Condition: Eliminating the Inhibition by CO

Pt-based catalysts, because of their outstanding activity for hydrocarbon oxidation, are widely used in the engine-exhaust aftertreatment system to remove emissions. However, CO and NOx present real engine exhausts compete with hydrocarbons active Pt sites, thus inhibit oxidation. In this work, we evaluated inhibition effects NO on isooctane oxidation over a Pt/CeO2 catalyst under simulated condition US DRIVE test protocol (S-GDI, stoichiometric gasoline direct injection). We also leveraged low-cost single-atom Cu1/CeO2 catalyst, which is highly low-temperature eliminate effect CO. Specifically, by physically mixing Pt/CeO2, all completely converted below 200 °C exhaust condition, helps lower temperature. unconverted still strongly suppresses HC Possible strategies address inhibitor were proposed.