Ag–CeO2/SBA-15 composite prepared from Pluronic P123@SBA-15 hybrid as catalyst for room-temperature reduction of 4-nitrophenol
| Autor: | A. Taratayko, Vladimir I. Zaikovskii, Grigory V. Mamontov, N. N. Mikheeva, Yu.V. Larichev |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Pore size
Materials science Small-angle X-ray scattering Composite number 4-Nitrophenol Sorption 02 engineering and technology General Chemistry Poloxamer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences восстановления 4-нитрофенола Catalysis 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering оксидные катализаторы 0210 nano-technology Ambient pressure серебряные катализаторы |
| Zdroj: | Catalysis today. 2021. Vol. 375. P. 576-584 |
| Popis: | The catalytic activity of the SBA-15-supported silver and/or ceria catalysts in the 4‑nitrophenol reduction under mild conditions is described. The catalysts are prepared by wetness impregnation of Pluronic P123@SBA-15 hybrid applied to stabilize small Ag and CeO2 particles. The bare SBA-15 and the catalysts on the basis thereof are characterized by N2 sorption, XRD, SAXS, TEM, UV–vis DRS, and H2-TPR. The catalysts possess high surface area (594−754 m2/g) and narrow pore size distributions (5.5–7.8 nm). Silver and ceria particles are stabilized in a highly dispersed state (predominant sizes below 5 nm) in the ordered SBA-15 structure. The Ag–CeO2/SBA-15 catalyst demonstrates the presence of the developed Ag–CeO2 interface that enhances the catalytic activity in 4-nitrophenol reduction to 4‑aminophenol (k = 0.016 s−1) at room temperature and ambient pressure due to the cooperation of silver and ceria active sites. |
| Databáze: | OpenAIRE |
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