Surface modification of LaMnO3 perovskite supported on CeO2 using argon plasma for high-performance reduction of NO

3DOM Mn-Based Perovskite Catalysts Modified by Potassium: Facile Synthesis and Excellent Catalytic Performance for Simultaneous Catalytic Elimination of Soot and NOx from Diesel Engines

“…This indicates that the organic templates and raw materials have been completely removed after calcination at 700 °C. In general, an FT-IR spectrum peak below 1000 cm –1 is associated with metal oxides . Lavat et al found that the B–O bonds in the BO 6 octahedral units were undoubtedly stronger than those of the 12-coordinated La–O units in ABO 3 perovskite, so the BO 6 structural unit plays a dominant role in the spectral behavior .…”

“…In general, an FT-IR spectrum peak below 1000 cm −1 is associated with metal oxides. 46 Lavat et al found that the B−O bonds in the BO 6 octahedral units were undoubtedly stronger than those of the 12-coordinated La−O units in ABO 3 perovskite, so the BO 6 structural unit plays a dominant role in the spectral behavior. 47 Normally, the crystal structure of LaMnO 3 perovskite is composed of an octahedron of MnO 6 , with two strong vibration peaks around ∼600 and ∼400 cm −1 .…”

Unravelling the correlation of dielectric barrier discharge power and performance of Pt/CeO2catalysts for toluene oxidation

“…2,25 In the plasmacatalysis system, the plasma had an impact on the catalyst's properties, such as acting on the structure and morphology, generating the notch or oxygen vacancy on the surface, altering the specific surface area and elemental chemical state, etc., and then promoting the catalytic activity of plasma-catalysis. 1,[26][27][28] Plasma as a tool for catalyst modification had an obvious effect on the Pt particle size due to Pt particle agglomeration or redispersion, and the concentration of oxygen vacancies due to the broken Ce-O bond, and the high energy electrons (e − ) and high active particles (O*, O 2 *, O − , O 2 − , O 3 , N*, NO*, NO − ) of plasma were considered as the action particles. 26,[29][30][31] After O 2 plasma treatment, surface nanostructures and surface peroxo (O 2 2− ) species were formed, which favour the uniform and dense distribution of isolated strongly bonded Pt 2+ atoms.…”

Four‐way purification of automobile exhaust over woody La0.8Ce0.2Fe0.3Co0.7O3 perovskite‐type catalysts enhanced by NTP

“…20 A large number of studies reported that PM, CO, HC can be used as reductants for NO x removal, and NO x can accelerate PM, CO, HC oxidation by the method of NTP combined with catalysts. [21][22][23] In previous studies, we prepared woody perovskite-type catalysts by biotemplating method combined with sol-gel method, and tested their purification performance. The results revealed that woody La 0.8 Ce 0.2-Fe 0.3 Co 0.7 O 3 can simultaneously purify PM, NO x , HC and CO emitted by engines.…”