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- W2624619134 abstract "A series of Pt–Sn/SBA-15 catalysts (Sn/Pt nominal ratios: 0–3) prepared by direct reduction were applied to ethylbenzene dehydrogenation to styrene. The characterization by X-ray diffraction, X-ray absorption fine structure, CO adsorption, transmission electron microscopy, and X-ray photoelectron spectroscopy revealed the formation of highly dispersed and stable Pt–Sn alloy particles [PtxSny (x/y ≥ 3) and Pt–Sn alloys having Sn-rich surfaces] on SBA-15. Nonalloyed Sn existed as highly dispersed SnO2. 1Pt–1Sn/SBA-15 (Sn/Pt nominal ratio = 1) exhibited the highest activity, on which Pt3Sn alloy nanoparticles were mainly formed. In contrast, PtSn alloy was dominant on Pt–Sn/SBA-15 catalysts whose Sn/Pt nominal ratios were larger than 1, and the activity was decreased. Furthermore, 1Pt–1Sn/SBA-15 exhibited a higher stability than Pt/SBA-15 and 1Pt–1Sn/SiO2. The addition of Sn not only inhibits C–C bond cleavage and improves selectivity toward styrene but also enhances the “drain-off” effect, allowing coke precursors to migrate from the active metals to SBA-15 with large surface area." @default.
- W2624619134 created "2017-06-15" @default.
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- W2624619134 date "2017-06-19" @default.
- W2624619134 modified "2023-10-01" @default.
- W2624619134 title "Highly Active and Stable Pt–Sn/SBA-15 Catalyst Prepared by Direct Reduction for Ethylbenzene Dehydrogenation: Effects of Sn Addition" @default.
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- W2624619134 doi "https://doi.org/10.1021/acs.iecr.7b01598" @default.
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