Efficient strategy for simultaneous gold deposition and obtention of hierarchical Au/TS-1 applied to liquid-phase propylene epoxidation

A novel and straightforward one-step method has been developed for the controlled deposition of gold nanoparticles (AuNPs) with uniform diameters onto the titanosilicate (TS-1) zeolitic surface via a direct anionic exchange (DAE) approach. This innovative process simultaneously introduces auxiliary mesoporosity into the zeolite framework, overcoming critical limitations associated with traditional microporous catalysts, including diffusion constraints and rapid deactivation. The resultant hierarchical Au/TS-1 catalyst demonstrates remarkable enhancements in catalytic performance for the liquid-phase propylene epoxidation with H2O2 coupled with outstanding stability, a challenge that has long hindered the application of such materials. With its exceptional catalytic properties and simplified preparation procedure, this system represents a significant advancement in catalyst design. The developed material shows great potential for industrial applications and paves the way for the creation of next-generation catalysts essential for sustainable development.

本研究开发了一种新颖简便的一步法，通过直接阴离子交换（DAE）策略，将粒径均一的金纳米颗粒（AuNPs）可控沉积于钛硅分子筛（TS-1）的沸石表面。该创新工艺可同步在沸石骨架中引入辅助介孔结构，攻克了传统微孔催化剂面临的关键局限，包括扩散限制与快速失活问题。所得分级多孔Au/TS-1催化剂在以过氧化氢（H₂O₂）为氧化剂的液相丙烯环氧化反应中展现出优异的催化性能，同时兼具出色的稳定性，解决了长期以来阻碍此类材料实际应用的核心难题。该体系凭借卓越的催化特性与简化的制备流程，代表了催化剂设计领域的重大进展。所开发的材料具备广阔的工业应用前景，同时为制备可持续发展所需的下一代催化剂铺平了道路。