Precisely Engineered Supported Gold Clusters as a Stable Catalyst for Propylene Epoxidation

Designing a stable and selective catalyst with high H2 utilisation is of pivotal importance for the direct gas-phase epoxidation propylene. This work describes facile one-pot methodology to synthesise ligand-stabilised sub-nanometre gold clusters immobilised onto zeolitic support (TS-1) engineer Au/TS-1 catalyst. A non-thermal O2 plasma technique used quick removal ligands limited increase in particle size. Compared untreated catalysts prepared using deposition precipitation method, synthesised exhibits improved catalytic performance, including 10 times longer lifetime (>20 days), increased PO selectivity hydrogen efficiency gas phase epoxidation. The structure-stability relationship illustrated multiple characterisation techniques, such as XPS, 31P MAS NMR, DR-UV/VIS, HRTEM TGA. It hypothesised that play guardian role stabilising Au size, which vital this reaction. strategy promising approach towards designing more heterogeneous