Strontium-Doped Perovskites Rival Platinum Catalysts for Treating NO x in Simulated Diesel Exhaust

• DOI: 10.1126/science.1184087
• Publication Date: 2010-03-25T18:51:38Z
• Authors: Chang Hwan Kim; Gongshin Qi; Kevin Dahlberg; Wei Li
• Keywords: 0303 health sciences; 03 medical and health sciences; 13. Climate action; 02 engineering and technology; 0210 nano-technology; 7. Clean energy

The high cost and poor thermal durability of current lean nitrogen oxides (NOx) aftertreatment catalysts are two the major barriers to widespread adoption highly fuel-efficient diesel engines. We demonstrated use strontium-doped perovskite as efficient platinum substitutes in oxidation (DOC) NOx trap (LNT) catalysts. lanthanum-based coated on monolith substrates showed excellent activities for NO reaction, a critical step that demands heavy usage system. Under realistic conditions, La(1-x)SrxCoO3 achieved higher NO-to-NO2 conversions than commercial platinum-based DOC catalyst. Similarly, La(0.9)Sr(0.1)MnO3-based LNT catalyst reduction performance comparable counterpart. results show promise considerably lower-cost exhaust treatment