Three-dimensional ordered macroporous LaFe 1- x Mn x O 3 with high stability for efficient NO oxidation and sulfur resistance.

NO x is an air pollutant that affects human health. A series of perovskite catalysts with different ratios of lanthanum, iron, and manganese and a three-dimensional ordered microporous structure was prepared, and the strongest catalytic performance was obtained with the LaFe 0.1 Mn 0.9 O 3 catalyst. LaFe 0.1 Mn 0.9 O 3 possesses the greatest number of oxygen vacancies and reached 77% NO oxidation conversion at 250 °C, with the highest NO oxidation conversion of 99% at 318 °C. This work provides a promising non-precious metal catalyst for NO oxidation and soot combustion.