Mediating Trade-Off Between Oxidability and SO₂ Resistance in Hydrocarbon Purification by Tailoring the Pt₁ Charge Density on Pt₁-[Pt₁/MnO₂]/Al₂O₃ Island-Sea Synergy System

How to break the trade-off effect between oxidability and SO₂ resistance through regulating the electron density of active sites during industrial volatile organic compounds (VOCs) decomposition is a huge challenge. Herein, the Pt₁ electron density was optimized by modulating the electrostatic adsorption ability of MnO₂ or Al₂O₃ with different structural characteristics. A synergistic Pt_1(0.2)-[Pt_1(0.8)/MnO₂]/Al₂O₃ island-sea catalyst converts 90% of acetone to CO₂ at just 160°C in the presence of 30 ppm SO₂ (apparent activation energy as low as 81.06 kJ·mol⁻¹), and displays high universality to other pollutants such as propane and toluene. Pt₁ atoms stabilized on MnO₂ island are mostly positively charged (Pt^δ+), which dominate in adsorbing and activating acetone molecules with high electronegativity. The strong interaction between Pt and MnO₂ can promote the cleavage of C-C and accelerate the generation of active *O species. Meanwhile, Pt₁ atoms on Al₂O₃ are proposed in metallic state (Pt⁰) to preferentially adsorb SO₂, producing inactive and easily decomposable SO₄²⁻/SO₃²⁻ species, therefore protecting the Pt^δ+ active sites. This work provides new ideas for developing specific catalysts with synergistic functionalities for efficacious catalytic purification of VOCs in industrial complex environments, displaying remarkable practicability and environmental significance.