Table 4.

Literature review of perovskite-based catalysts for the simultaneous removal of soot and NO_x.

Perovskites Families	Chemical Composition	Catalysts	Preparation Method	Reaction Conditions	Ref.
Manganites	A1–x RxMnO3	La1−xKxMnO3 (x = 0.1, 0.2, 0.25, 0.3)	Co-precipitation; calc. 850–950 °C	Cat/soot = 20/1; NO (0.5%) + O2 (5%) + He; total flow 20 cm3/min; heating rate 1 °C/min	[38]
		La1−xKxMnO3	Citrate-combustion route; calc. 750 °C	Cat/soot = 10/1; 10% O2 + 0.5% NO + He; total flow 100 mL/min; heating rate 1 °C/min	[39]
		La1−xKxMnO3	Complex combustion method; calc. 800 °C	Cat/soot = 10/1; NO 1000 ppm + O2 0.5 vol% + He. total flow 70 mL/min; heating rate 5 °C/min.	[40]
		La0.7Ag0.3MnO3	Solid-state method; calc. 600 °C	Cat/soot = 20/1; 10% NO-Ar mixture 30 mL/min, oxygen 10 mL/min, air 60 mL/min; heating rate 10 °C/min	[41]
Cobaltites	A1−xRxCoO3	La1−xKxCoO3	Citric acid-ligated method; calc. 800 °C	Cat/soot = 5/1; 5% O2 + 2000 ppm NO + He; total flow 50 cm3/min; heating rate 2 °C/min	[42]
		La1−xKxCoO3	Complex combustion method; calc. 800 °C	Cat/soot = 10/1; NO 1000 ppm + O2 0.5 vol% + He. total flow 70 mL/min; heating rate 5 °C/min.	[40]
Ferrites	A1−xRxFeO3	La1−xKxFeO3	complex combustion method; calc. 800 °C	Cat/soot = 10/1; NO 1000 ppm + O2 0.5 vol% + He. total flow 70 mL/min; heating rate 5 °C/min.	[40]
Chromites	A1−xRxCrO3	La1−xKxCrO3	citrate-combustion route; calc. 700 °C	Cat/soot = 10/1; 10% O2 + 0.5% NO + He; total flow 100 mL/min; heating rate 1 °C/min	[39]
Titanites	A1−xRxTiO3	Sr0.8K0.2TiO3	sol–gel method; calc. 850 °C	Cat/soot = 4/1; 500 ppm NOx + O2 5% + N2; heating rate 10 °C/min.	[43]