Highly Selective Catalysis at the Liquid–Liquid Interface Microregion

Liquid–liquid interfaces in principle have the potential to regulate selectivity of chemical reactions because highly anisotropic microenvironments but not yet been well exploited. Here, we present a liquid–liquid interface-based strategy boost catalytic selectivity, exemplified by selective hydrogenation α,β-unsaturated aldehydes. The key this success is spatially controlled assembly tubular catalyst particles, just at narrow inner interfacial layer Pickering emulsion water droplets. particles that are assembled droplets exhibit much higher C═O than ones located either outer layer, interior droplets, or conventionally called interface. A 92.0–98.0% thermodynamically and kinetically unfavorable over C═C was achieved unexpectedly. Our phenomena catalysis reported here constitute an important supplement existing methods for tuning providing tremendous opportunities construct systems.