Weissenberger, T;
Kapil, N;
Trogadas, P;
Coppens, MO;
(2022)
One-pot Synthesis of Hierarchical, Micro-macroporous Zeolites with Encapsulated Metal Particles as Sinter-resistant, Bifunctional Catalysts.
ChemCatChem
, Article e202200268. 10.1002/cctc.202200268.
(In press).
Preview |
PDF
Coppens_ChemCatChem_VoR.pdf - Published Version Download (2MB) | Preview |
Abstract
We report a new one-pot synthesis procedure for hierarchical zeolites with intracrystalline macropores and metal particles encapsulated within the zeolitic walls. The synthesis allows to prepare macroporous zeolites of MFI topology with different heteroatoms (silicalite-1, ZSM-5 and TS-1) and different encapsulated noble metal particles, such as gold, platinum and palladium. The hierarchically structured zeolites contain large macropores with diameters around 400 nm, which are well distributed and interconnected and should significantly enhance mass transport properties. The encapsulation of metal nanoparticles within the zeolitic walls leads to remarkable sinter resistance of the particles. Encapsulated gold nanoparticles (2.6 nm) do not significantly change in size during an 18-hour treatment at 600 °C under air, while non-encapsulated gold particles sinter heavily during the same treatment. Catalytic experiments for the direct epoxidation of propene with hydrogen and oxygen show that both catalytic functions of a macroporous TS-1 sample that encapsulates gold particles are accessible and active. This catalyst displays high activity, although PO selectivity could still be improved. These materials show great potential for use in catalytic applications, due to their bifunctional nature, high sintering resistance, shape selective properties and hierarchical structure.
| Type: | Article |
|---|---|
| Title: | One-pot Synthesis of Hierarchical, Micro-macroporous Zeolites with Encapsulated Metal Particles as Sinter-resistant, Bifunctional Catalysts |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/cctc.202200268 |
| Publisher version: | https://doi.org/10.1002/cctc.202200268 |
| Language: | English |
| Additional information: | © 2022 The Authors. ChemCatChem published by Wiley-VCH GmbH. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10149593 |
Archive Staff Only
 |
View Item |
