Au nanoparticles deposited on the external surfaces of TS-1: Enhanced stability and activity for direct propylene epoxidation with H2 and O2.

Highlights: [•] First direct evidence of pore blocking for the deactivation of Au/TS-1 catalysts. [•] Uncalcined TS-1 with blocked micropores has higher gold loading efficiency. [•] Au/TS-1-B catalyst exhibits enhanced stability for over 30h. [•] Au/TS-1-B catalyst prepared by DP method shows high PO formation rate. [ABSTRACT FROM AUTHOR]