Modification of the applied Pt-containing catalysts with rare-earth metals is one of effective ways to increase their activity and resistance to thermal deactivation, which is associated with both an increase in thermal stability of the texture and structure of the carrier material and an increase in the degree of dispersion and resistance to sintering of the applied platinum metals (PM) when exposed to high temperatures. Conflicting data make it difficult to select a suitable modifier for the use as part of a three-way catalyst in the exhaust treatment system of gasoline-powered cars, whose function is to simultaneously convert CO, C_xH_y and NO_x. In this work, the effect of europium-modified Pt-containing γ-Al₂O₃ -based catalyst on its physicochemical properties and activity in the oxidation of CO, C_xH_y, and NO_x reduction processes was evaluated. The catalytic activity was evaluated by passing a gas mixture simulating the exhaust of a gasoline-powered car through the catalyst applied onto the surface of a cylindrical honeycomb block with simultaneous measurement of the degree of conversion of toxic components into relatively non-toxic CO₂, N₂ and H₂O in the temperature range from 100⁰C to 400⁰C. The modification of the Pt/γ-Al₂O₃ catalytic system with europium was shown to enhance the activity in all three reactions studied, indicating a great potential for the use as a modifier of a three-way catalyst

doi.org/10.32737/0005-2531-2023-4-112-119