التفاصيل البيبلوغرافية
| العنوان: |
The structural decoration of Ru catalysts by boron for enhanced propane dehydrogenation. |
| المؤلفون: |
Tianxing Yang, Rui Ma, Jiale Li, Yanan Liu, Junting Feng, Yufei He, Dianqing Li |
| المصدر: |
Fundamental Research; Sep2024, Vol. 4 Issue 5, p1147-1156, 10p |
| مصطلحات موضوعية: |
RUTHENIUM catalysts, SURFACE structure, DEHYDROGENATION, PROPANE, PROPENE |
| مستخلص: |
Propane dehydrogenation (PDH) is an efficient technology for the direct production of propylene. Nevertheless, current PDH catalysts mainly rely on precious Pt or toxic Cr and especially undergo severe coke deposition. Herein, we report a Ru catalyst decorated by boron species (Ru-3B/Al2O3), which exhibits high catalytic performance for PDH. HAADF-STEM, EELS, and CO-FTIR characterization are used to identify the surface structure of the Ru active component, which shows that the high-energy unsaturated coordination sites, including corners, edges and step atoms for Ru-3B/Al2O3, are appropriately modified by BOx species. The encapsulation of high-energy active sites prone to C-C cracking and deep dehydrogenation leads to higher propylene selectivity (> 95%) and strong carbon resistance (kd 0.0007 min) over Ru-3B/Al2O3. The XPS and H2 -TPR results show that the migration of B species is driven by the reduction of B2 O3 to B2 O2 and that the coating degree of Ru particles is controlled by the chemical valance of Ru species. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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