Ultralight and spongy La–Mn-based perovskite catalysts modified by alkali metals and Ce: facile synthesis and excellent catalytic performance for soot combustion

Abstract

Soot particles released from diesel engines have been considered as one of main sources for air pollution, and the elimination of soot particles has become a crucial issue for air...

Research progress on the preparation of transition metal-modified zeolite catalysts and their catalytic performance for the purification of engine exhausts

“…In recent years, many catalysts such as noble metal catalysts, transition metal oxides, and perovskite-type oxides have been reported for soot combustion. 234,235 In order to design efficient catalysts further, hierarchical porous zeolites containing micro-and mesoporous systems have received widespread attention in the design of catalysts because of their higher specic surface area and hydrothermal stability. Liu et al 236 prepared Pt/HZSM-5 and Pt/USY catalysts using HZSM-5 and USY zeolites as supports, and investigated the effect of hydrothermal aging on the catalytic oxidation of soot by catalysts.…”

Cerium Doping Effect in 3DOM Perovskite-Type La2−xCexCoNiO6 Catalysts for Boosting Soot Oxidation

“…To date, researchers have effectively developed an array of diverse, highly efficient catalysts for deep catalytic soot oxidation at lower temperatures, encompassing noble metals [12][13][14][15], transition metal oxides [16][17][18][19], perovskite-type oxides [20][21][22][23][24], spinel-type oxides [25][26][27], rare-earth-based materials [28][29][30], and various other materials. Noble metal catalysts, characterized by their abundant unoccupied d-orbitals, demonstrate exceptional catalytic performance and have been commercially preferred for a long time [31,32].…”