Highly efficient catalytic propane dehydrogenation driven by MFI zeolite defect sites
Abstract Propane dehydrogenation (PDH) is a critical technology for propylene production, yet overcoming the trade-off between activity and stability remains a major challenge. Here, we engineer a robust Pt@Sn-MFI catalyst with a wormhole-type structure, featuring highly dispersed Pt clusters robust...
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| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-07-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-61182-6 |
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| Summary: | Abstract Propane dehydrogenation (PDH) is a critical technology for propylene production, yet overcoming the trade-off between activity and stability remains a major challenge. Here, we engineer a robust Pt@Sn-MFI catalyst with a wormhole-type structure, featuring highly dispersed Pt clusters robustly anchored by open sites in Sn-MFI, i.e., [SiO]3 − Sn−O−Ptn, complemented by abundant zeolite defects (i.e., Si-OH) in the proximity. This architecture enables a near-thermodynamic equilibrium conversion and a propylene selectivity of ≥98.5%, with the high apparent forward rate coefficient of 1064.5 molC3H6 gPt −1h−1bar−1 and stability for at least 120 h without requiring H2 or CO2 co-feeding. Comprehensive characterization, isotope-labeling experiments and theoretical calculations reveal a plausible hydroxy-assisted PDH reaction pathway, wherein the synergy between Pt sites and neighboring hydroxyl groups (i.e., zeolite defects) significantly reduces the energy barrier for H2 formation via the combination of H in propane adsorbed on Pt sites with H in hydroxyl groups, thereby promoting the PDH process. |
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| ISSN: | 2041-1723 |