Selective catalytic reduction of NOx with NH3 over core-shell Ce@W catalyst |
| |
| Affiliation: | 1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China;2. Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, China;3. CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China |
| |
| Abstract: | An environmentally benign WO3 wrapped cubic CeO2 core–shell catalyst (Ce@W) was developed for the selective catalytic reduction of NOx with NH3. Compared with CeW particles prepared via the conventional co-precipitation method, this core–shell catalyst not only displays higher tolerance to SO2 and H2O, but also exhibits a wider activity temperature window of 250–450 °C, in which NOx conversion and N2 selectivity reaches 100%. The improved performance of Ce@W catalysts can be contributed to the strong interactions between CeO2 (100) and WO3, which generates more Ce3+ and surface chemisorbed oxygen. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTs) reveal that the more thermally stable Brønsted acid sites on Ce@W lead to its excellent high-temperature activity. |
| |
| Keywords: | Nitrogen oxides Ce@W Rare earths |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
