Methane conversion and SO2 resistance of LaMn1−xFexO3 (x=0.4, 0.5, 0.6, 1) perovskite catalysts promoted with palladium

Kinetic consequences of methane combustion on Pd, Pt and Pd–Pt catalysts

The kinetic consequences of methane combustion on Pd_xPt_1−x oxide surfaces were investigated with kinetic data and density functional theory treatments.

High specific surface area LaMO3 (M = Co, Mn) hollow spheres: synthesis, characterization and catalytic properties in methane combustion

LaMO₃ (M = Mn, Co) hollow spheres were synthesized by a carbon sphere template method, while a slow heating rate resulted in multishelled hollow spheres.

Strontium-doped perovskites rival platinum catalysts for treating NOx in simulated diesel exhaust

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