Modulate the superficial structure of La2Ce2O7 catalyst with anchoring CuO species for the selective catalytic oxidation of NH3
| Autor: | Xiangchen Kong, Yuankai Shao, Zhenguo Li, Shengli Zhu, Congjie Lv, Wu Hanming, Xiaoning Ren, Cheng Lv, Kaixiang Li |
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| Rok vydání: | 2022 |
| Předmět: |
Materials science
Polymers and Plastics Mechanical Engineering Composite number Energy conversion efficiency Metals and Alloys Pyrochlore Anchoring engineering.material Slip (ceramics) Catalysis Ammonia chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials visual_art Materials Chemistry Ceramics and Composites engineering visual_art.visual_art_medium Molecule |
| Zdroj: | Journal of Materials Science & Technology. 111:1-8 |
| ISSN: | 1005-0302 |
| Popis: | Air contamination caused by the ammonia slip phenomenon has gradually captured the researcher's extensive attention. An effective strategy for controlling fugitive NH3 is critical to improving the air quality and living environment. In the present work, CuOx/La2Ce2O7 composite as a potential candidate catalyst is synthesized through the electrostatic adsorption method for the selective catalytic oxidation (SCO) of NH3 to N2. The 5% CuOx/La2Ce2O7 exhibits the best catalytic activity (T90 =243 ℃) and ammonia conversion efficiency. The improvement of performance is mainly attributed to the superficial connection of [Ce-O-Cu], which enhances the capturing ability of ammonia molecule and accelerates the dissociating efficiency of N-H bonding for N2 evolution, simultaneously. This work provides a facile method to synthesis pyrochlore composite catalyst of NH3-SCO for solving the problem of ammonia slip pollution in the future. |
| Databáze: | OpenAIRE |
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