CeO2-Grafted Mn–Fe Oxide Composites as Alternative Oxygen-Storage Materials for Three-Way Catalysts: Laboratory and Chassis Dynamometer Tests
| Autor: | Mana Ueno, Hirohide Furutani, Tetsuya Nanba, Sae Kurusu, Satoshi Hinokuma, Osamu Shinozaki, Masato Machida, Takeshi Omura |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Oxygen storage General Chemical Engineering Composite number Oxide chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Redox Oxygen Industrial and Manufacturing Engineering 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry Honeycomb Composite material 0210 nano-technology Petrol engine |
| Zdroj: | Industrial & Engineering Chemistry Research. 56:3184-3193 |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/acs.iecr.6b04468 |
| Popis: | A CeO2-grafted MnFeOy (CeO2/MnFeOy) has been developed as a substitute for the oxygen-storage CeO2 material in three-way catalysts. In the CeO2/MnFeOy composite, CeO2 grains were intimately bound to the surface of the MnFeOy solid solution, which adopted an α-Mn2O3-type structure. Because the surface-grafted CeO2 acts as an oxygen gateway and MnFeOy acts as an oxygen reservoir, the combination of these oxides has a synergistic effect leading to the fast release and storage of a larger amount of oxygen compared with the separate constituents. The catalytic and oxygen release and storage performances of CeO2/MnFeOy were superior to those of CeO2/Fe2O3 in a previous study and were correlated to the contribution of Mn in the redox cycles. Finally, a real-sized honeycomb catalyst containing CeO2/MnFeOy was developed and tested using a vehicle driven on a chassis dynamometer in the JC08 (hot start) mode for gasoline engine vehicles (Japanese-type approval test cycle) and compared with a reference honeycomb cata... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|