One‐Pot Synthesis of Catalytically Stable and Active Nanoreactors: Encapsulation of Size‐Controlled Nanoparticles within a Hierarchically Macroporous Core@Ordered Mesoporous Shell System

Size-controlled, catalytically active nanoparticles are successfully encapsulated in a one-pot synthesis to form novel hierarchical macroporous core@mesoporous shell structures, where macroporous cores are connected by uniform and ordered mesoporous channels. Most importantly, the encapsulated nanoparticles can be used as “nanoreactors”, with high activities and excellent long-term recycling stability.