ChemInform Abstract: Strontium‐Doped Perovskites Rival Platinum Catalysts for Treating NO_x in Simulated Diesel Exhaust.

Abstract

. -Strontium-doped perovskite oxides are efficient Pt substitutes in diesel oxidation and lean NOx trap catalysts. Under realistic conditions, a La0.9Sr0.1CoO3 catalyst achieves higher NO-to-NO2 conversion than a commercial Pt-based diesel oxidation catalyst. Similarly, a La0.9Sr0.1MnO3-based lean NOx trap catalyst achieves NO x reduction performance comparable to that of a commercial Pt-based counterpart. The results are promising for a considerably lower-cost diesel exhaust treatment system. -(KIM, C. H.; QI, G.; DAHLBERG, K.; LI*, W.; Sci.

Interfacial Charging–Decharging Strategy for Efficient and Selective Aerobic NO Oxidation on Oxygen Vacancy

“…Removal of NO necessitates precise control of partial or complete oxidation, 13,14 because partial oxidation of NO to NO 2 is highly desirable for consecutive selective NO x (NO, NO 2 ) reduction or transient storage in stationary plants or "lean-burn" engines. 15,16 However, NO 2 with acute biotoxicity is extremely risky when diffused into air. Since abundant parallel pathways coexist in NO oxidations with interconvertible nitrogen oxide forms (NO 2 , N 2 O 4 , NO 2 − , NO 3 − ), delicate manipulation of efficiency and selectivity of NO oxidation still remains a great challenge.…”

Can NOx reduction by CO react over carbon‐based single‐atom catalysts at low temperatures? A theoretical study

“…However, the import of nitrogen‐containing reducing agent requires large investments and causes corrosion of equipment. The leakage of NH 3 also leads to the secondary pollution 5 . It has been noted that in some heavy industries, both CO and NO x are simultaneously generated in the flue gas 6,7 .…”

Critical Role of Mullite-type Oxides’ Surface Chemistry on Catalytic NO Oxidation Performance

“…For example, binary oxides 6,7 and ABO 3 (A = rare earth, B = TM) perovskites have been investigated for oxidation of NO to NO 2 for exhaust emission control. 8,9 More recently, AB 2 O 5 mullitetype oxides have been shown to exhibit superior NO catalytic performance compared to Pt and perovskite oxides. 10−13 Because these heterogeneous reactions are a surface mediated process, an efficient formulation of a catalyst should rely not only on its bulk crystalline structural design, but also most importantly on its surface properties.…”