Applying Magnetic‐Responsive Nanocatalyst‐Liquid Interface for Active Molecule Manipulation to Boost Catalysis Beyond Diffusion Limit

Efficient nanocatalysis requires swift delivery of reactants to catalytic sites, but the presence of diffusion‐dominated, hydrodynamic boundary layers on all heterogeneous catalysts impedes fast chemical transformation. Here, efficient nanocatalysis is achieved by applying a magnetic‐responsive nanocatalyst‐liquid interface to create a vortex‐like flow that rapidly pulls reactants from bulk solution to the catalyst, beyond the diffusion limit. Consequently, our design attains a >90 % degradation efficiency in 10‐fold and 30‐fold faster than traditional homogenization methods, respectively. This unique molecule delivery design will complement recent advances in active catalytic nanomaterials to realize ideal nanocatalysis in emerging chemical, energy, and environmental applications. Dynamic manipulation of a spinning nanocatalyst‐liquid interface accelerates reactants delivery to catalytic sites via a vortex‐like, hydrodynamic flow that originates from the nanocatalytic ensemble. This design consequently achieves efficient nanocatalysis by enabling fast and steady chemical transformations, notably overcoming the formidable diffusion barrier that occurs at the solid‐liquid interface of most heterogeneous (nano)catalysts.