Dobó Dorina G. and Sápi András and Halasi Gyula and Sebők Dániel and Juhász Koppány Levente and Kukovecz Ákos and Kónya Zoltán: Study of 1.8 NM Pt nanoparticles anchored on different amorphous silica supports in ethanol decomposition reaction.
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Abstract
1.8 nm Pt nanoparticles with narrow size distribution were anchored on mostly identical, amorphous silica supports (SBA-15 [1], MCF-17 [2], Silica Foam [3]) and were tested in ethanol decomposition reactions at < 573 K. The reaction on the Pt/SF (0.117 molecules·site-1 ·s-1 ) was ~2 times faster compared to Pt/MCF-17 (0.055 molecules·site-1 ·s-1 ) and Pt/SBA-15 (0.063 molecules·site-1 ·s-1 ) at 573 K. In the case of Pt/SBA-15, selectivity towards acetaldehyde was ~4 times higher (68%) compared to the Pt/MCF-17 (18%) and Pt/SF (16%) catalysts. In the case of Pt/MCF-17 and Pt/SF, the methane to acetaldehyde ratio was 0.27 and 0.24, respectively, while it was ~ 10 times higher (1.97) for Pt/SBA-15 catalyst. The ethene selectivity was ~2 times higher in the case of Pt/MCF-17 (0.99%) and Pt/SF (0.93%) compared to Pt/SBA-15 (0.41%). Pt/MCF17 and Pt/SBA-15 produces ~ 50% more hydrogen (~27%) compared to Pt/SF catalyst (21 %). Small Angle X-ray Scattering (SAXS) and Transmission Electron Microscopy (TEM) studies showed striking differences in the porosity, pore- and mesostructure, sintering and Pt-SiO2 interface altering effect of the silica supports as well as the Pt nanoparticles decorated catalysts which may have significant effect on the catalytic activity.
| Item Type: | Conference or Workshop Item |
|---|---|
| Journal or Publication Title: | Proceedings of the International Symposium on Analytical and Environmental Problems |
| Date: | 2016 |
| Volume: | 22 |
| ISBN: | 978-963-306-507-5 |
| Page Range: | pp. 346-347 |
| Event Title: | International Symposium on Analytical and Environmental Problems (22.) (2016) (Szeged) |
| Related URLs: | http://acta.bibl.u-szeged.hu/55893/ |
| Uncontrolled Keywords: | Környezetkémia - előadáskivonat, Kémia - előadáskivonat |
| Additional Information: | Bibliogr.: 347. p. ; ill. ; összefoglalás angol nyelven |
| Date Deposited: | 2018. Dec. 13. 09:39 |
| Last Modified: | 2022. Aug. 08. 15:48 |
| URI: | http://acta.bibl.u-szeged.hu/id/eprint/56116 |
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