Sparsely loaded Pt/MIL-96(Al) MOFs catalyst with enhanced activity for H2-SCR in a gas diffusion reactor under 80 °C
| Autor: | Wei Sun, Limei Cao, Yijun Xue, Qian Wang, Ji Yang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
General Chemical Engineering Catalyst support chemistry.chemical_element Nanotechnology 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering Hydrothermal circulation 0104 chemical sciences Catalysis Metal X-ray photoelectron spectroscopy chemistry Chemical engineering Aluminium visual_art visual_art.visual_art_medium Environmental Chemistry Gaseous diffusion Thermal stability 0210 nano-technology |
| Zdroj: | Chemical Engineering Journal. 335:612-620 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2017.11.011 |
| Popis: | MOFs (metal-organic frameworks) are stable materials with both organic and inorganic pores, and possess high surface area fascinating structures. Owing to the unique octahedral of aluminum center and strong Al–O bonds, Al-based MOFs show excellent thermal stability. In this paper, MIL-96(Al) is proved to be effective at dispersing Pt particles evenly and sparsely as it is employed as catalyst support. MIL-96(Al) is synthesized via a water based route and different contents of Pt particles are directly deposited on the surface of MIL-96 in one step by hydrothermal method to prepare PtXMIL-96 (x represents Pt content) catalysts. The catalyst are sprayed evenly on carbon paper, with Pt content of 0.03%, 0.11%, 0.27% and 0.41%, respectively, and are applied in a gas diffusion reactor with snakelike flow field for low temperature H2-SCR. For Pt5MIL-96/CP, the NO removal efficiency can reach up to 100% at 60 °C. Electron transfer between Pt and MIL-96 is observed via X-ray photoelectron spectron (XPS). It reveals that the deposited Pt is in metallic state. Meanwhile, the electronic structure of MIL-96 is kept intact in the process of Pt depositing. The excellent performance of Pt5MIL-96/CP catalyst strongly suggests its potential application. |
| Databáze: | OpenAIRE |
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