Say, Z.Mihai, O.Tohumeken, M.Ercan, K. E.Olsson, L.Ozensoy, E.2018-04-122018-04-1220172044-4753http://hdl.handle.net/11693/37251Advanced quaternary mixed oxide materials in the form of BaO/Al2O3/ZrO2/TiO2 functionalized with Pt active sites (i.e. Pt/BaO/AZT) were synthesized and structurally characterized via XRD and BET in comparison to a conventional Pt/20BaO/Al benchmark NSR/LNT catalyst. The interactions of these catalysts' surfaces with SOx and NOx gases were monitored via in situ FTIR and TPD. There exists a delicate trade-off between NOx storage capacity (NSC) and sulfur uptake/poisoning which is strongly governed by the BaO loading/ dispersion as well as the surface structure and acidity of the support material. Flow reactor measurements performed under realistic catalytic conditions show the high NOx activity for the Pt/20BaO/AZT catalyst at 573 K. After sulfur poisoning and subsequent regeneration at 773 and 973 K, Pt/20BaO/AZT surpassed the NOx catalytic performance at 573 K of all other investigated materials including the conventional Pt/ 20BaO/Al benchmark catalyst.EnglishBenchmarkingCatalyst activityCatalyst poisoningCatalystsEconomic and social effectsSulfurCatalytic conditionsCatalytic performanceFlow reactorsFunctionalizedStorage capacitySulfur poisoningSulfur uptakesSupport materialsPlatinumArticle10.1039/c6cy01898j2044-4761