“…Therefore, the focus in the CRT system for soot elimination is to develop effective catalysts, which can oxidize soot within the temperature range (250–400 °C) of diesel engine exhaust. A large number of catalysts for soot combustion have been reported, such as noble metals, , perovskites, − spinel-type oxides, , hydrotalcites, , alkaline metal oxides, , ceria-based oxides, − and transition metal oxides. − Recently, Fang et al synthesized the perovskite-type La 1– x K x FeO 3‑δ nanotubes, which showed high material utilization efficiency and improved catalytic soot oxidation activity. Hernández et al reported an Ag-modified LaSrAgMn perovskite with promising catalytic soot oxidation performance under low O 2 partial pressure.…”