Supported Gold Clusters with Modulated Environment As Highly Stable Catalysts for Propylene Epoxidation
- Type: Conference Presentation
- Conference Type: AIChE Annual Meeting
- Presentation Date: November 19, 2020
- Duration: 14 minutes
- Skill Level: Intermediate
- PDHs: 0.20
In this study, we report a facile, one pot synthesis of sub-nanometer gold clusters using triphenylphosphine as a stabilizing ligand. Furthermore, the pre-synthesized gold nanoparticles are successfully immobilized onto a titanosilicalite-1 (TS-1) support, and a non-thermal plasma is used for the removal of bound ligands with minimum alteration in the size of the gold particles. The catalytic performance of these supported gold clusters for gas phase propylene epoxidation using H2 and O2 is presented. These materials exhibit better hydrogen efficiency, high selectivity towards PO and remarkably improved stability, as compared to previously reported Au/TS-1 catalysts. The structure-function relationships for the enhanced stability and selectivity are elucidated using a range of techniques, including HRTEM, XPS, TGA, DR-UV/VIS and 31P MAS NMR.
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