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Fabrication of La1−Ca FeO3 perovskite-type oxides with macro-mesoporous structure via a dual-template method for highly efficient soot combustion
- Source :
- Journal of Rare Earths. 38:369-375
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- A series of three-dimensionally ordered macro-mesoporous (3DOMM) La1−xCaxFeO3 (x = 0–0.3) perovskite-type oxides were designed and successfully fabricated for the first time via a dual-template method. In which, PMMA and Brij-56 were employed as the hard template and soft template, respectively. It is found that 3DOMM La1−xCaxFeO3 exhibits abundant wormlike mesoporous channels about 3 nm in diameter on macroporous skeleton walls. The excellent catalytic activity of soot combustion benefits from not only the well-designed hierarchical porous structure of catalyst, but also the redox electron pair of Fe3+/Fe4+ induced by the doping of low-valent alkaline earth metal Ca to A-site of LaFeO3. 3DOMM La0.8Ca0.2FeO3 exhibits superior catalytic performance for soot combustion, which shows T50 of 396 °C. It is 189 °C lower than that without catalyst. A combination of structure and composition in the design of catalyst can be widely extended to other catalytic systems.
- Subjects :
- Materials science
Fabrication
Doping
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Combustion
medicine.disease_cause
01 natural sciences
Soot
0104 chemical sciences
Catalysis
Chemical engineering
Geochemistry and Petrology
medicine
0210 nano-technology
Mesoporous material
Perovskite (structure)
Template method pattern
Subjects
Details
- ISSN :
- 10020721
- Volume :
- 38
- Database :
- OpenAIRE
- Journal :
- Journal of Rare Earths
- Accession number :
- edsair.doi...........7cc787adee97364d53539dab93ed5d26