6533b7d6fe1ef96bd12664ea

RESEARCH PRODUCT

A study of the behaviour of Pt supported on CeO2–ZrO2/Al2O3–BaO as NO storage–reduction catalyst for the treatment of lean burn engine emissions

Massimiliano LiviGiuseppe ArenaGiulio DeganelloGabriele CentiA. MacalusoLeonarda F. Liotta

subject

Barium oxideInorganic chemistrychemistry.chemical_elementGeneral ChemistryHeterogeneous catalysisCatalysisOverlayerlaw.inventionCatalysischemistry.chemical_compoundchemistrylawCalcinationPlatinumNOxLean burn

description

Abstract The behaviour of a Pt(1 wt.%) supported on CeO2–ZrO2(20 wt.%)/Al2O3(64 wt.%)–BaO(16 wt.%) as a novel NOx storage–reduction catalyst is studied by reactivity tests and DRIFT experiments and compared with that of Pt(1%)–BaO(15 wt.%) on alumina. The former catalyst, designed as a hydrothermally stable sample, is composed of an alumina modified with Ba ions and an overlayer of ceria-zirconia. The results pointed out that during the calcination barium ions migrates over the surface of the catalyst which thus show a good NOx storage–reduction behaviour comparable with that of Pt–BaO on alumina, although Ba ions result much better dispersed.

yearjournalcountryeditionlanguage
2002-07-01Catalysis Today
https://doi.org/10.1016/s0920-5861(02)00094-9