One-Step Hydrogenation/Esterification Activity Enhancement Over Bifunctional Mesoporous Organic–Inorganic Hybrid Silicas
| العنوان: | One-Step Hydrogenation/Esterification Activity Enhancement Over Bifunctional Mesoporous Organic–Inorganic Hybrid Silicas |
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| المؤلفون: | Liuye Mo, Yang Tang, Shaojun Miao, Xiaoming Zheng, Brent H. Shanks |
| المصدر: | Topics in Catalysis. 56:1804-1813 |
| بيانات النشر: | Springer Science and Business Media LLC, 2013. |
| سنة النشر: | 2013 |
| مصطلحات موضوعية: | chemistry.chemical_classification, Inorganic chemistry, chemistry.chemical_element, General Chemistry, Mesoporous silica, Catalysis, Bifunctional catalyst, Acetic acid, chemistry.chemical_compound, Acid strength, chemistry, Polymer chemistry, Platinum, Bifunctional, Mesoporous material |
| الوصف: | Bifunctional mesoporous organic–inorganic hybrid silica incorporating both platinum and organosulfonic acid groups were synthesized for use in simultaneously catalyzing the one-step hydrogenation/esterification (OHE) of acetic acid and acetaldehyde, which was considered as a model reaction for the upgrading of biomass-derived bio-oil. The work explored optimizing the synthesis procedure to generate a bifunctional catalyst with enhanced combined activity for the OHE reaction. The presence of Pt was found to enhance the acidic properties of the organosulfonic acid functionalized silica. The mechanism by which the Pt incorporation affected the acid sites was investigated by the using XPS, FT-IR, FT-Raman characterization. The XPS results indicated the presence of electron transfer between the Pt and –SO3H groups. The FT-IR and FT-Raman results, which were in agreement with XPS, demonstrated an electron density increase for S and a S–O bond energy increase, which was proposed to be the reason for the acidity enhancement due to the presence of Pt. Additionally, arenesulfonic acid groups were substituted for propylsulfonic acid groups and the resulting material had higher catalytic activity due to the increased acid strength. An optimal synthesis procedure was demonstrated in which the Pt was first impregnated on the mesoporous silica using reductive deposition. Then Pt was activated and the material further modified by grafting on arenesulfonic acid groups. The resulting catalyst was about four times more active than the original base case bifunctional material. |
| تدمد: | 1572-9028 1022-5528 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::efc4283bb0331942b734c67a3a2a6a70 https://doi.org/10.1007/s11244-013-0117-z |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........efc4283bb0331942b734c67a3a2a6a70 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 15729028 10225528 |
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