Stable Palladium Oxide Clusters Encapsulated in Silicalite-1 for Complete Methane Oxidation

Zeolite-supported metal catalysts are widely employed in a number of chemical processes, and the stability catalytically active species is one most critical factors determining reaction performance. A good example Pd/zeolite catalyst, which provides high activity for methane oxidation but deactivates rapidly under conditions due to palladium nanoparticle sintering. Although coating metals with thin shells porous materials promising strategy address sintering metals, it still challenging fix small particles completely inside zeolite crystals. Here, using an amine-based ligand stabilize during synthesis, we realize exclusive encapsulation highly dispersed oxide clusters (1.8–2.8 nm) microporous channels voids nanosized silicalite-1 The synthesis zeolite-supported catalyst influence degree size distribution particles. Thanks effect clusters, together inherent properties such as low acidity, hydrophobicity, hydrothermal stability, optimized Pd@silicalite-1 outperforms traditional Pd-based prepared by wetness impregnation, exhibiting both better lean reaction.