Heteroatom-Engineered Atomic Electric Fields Activate C–F Bond for Efficient Perfluorocarbon Decomposition

Tetrafluoromethane (CF 4 ), among the most chemically inert per- and polyfluoroalkyl substances (PFAS), poses a formidable challenge for catalytic decomposition due to its exceptionally strong C–F bonds. Here, we report a strong atomic-scale local electric-field (LEF) engineering strategy that enables efficient CF 4 activation and decomposition. By incorporating Ga–Zn dual-atom into Al 2 O 3 (Ga 1 Zn 1 /Al 2 O 3 ), it generates a highly intensified and spatially confined electric field (∼3 × 10 10 N/C). Spectroscopic characterizations reveal that this LEF amplifies the Lewis acidity of neighboring tricoordination Al (Al III ) sites, significantly strengthens CF 4 adsorption through interfacial polarization, and promotes C–F bond stretching and cleavage. As a result, the Ga 1 Zn 1 /Al 2 O 3 catalyst delivers complete CF 4 conversion at an ultralow temperature of 540 °C, exhibiting an apparent turnover frequency 4.5 times higher and an apparent activation energy nearly half that of pristine Al 2 O 3 . The catalyst also demonstrates exceptional durability, maintaining 100% conversion for over 600 h under continuous operation, indicating robust structural and catalytic stability. This work establishes dual-atom-induced LEF engineering as a powerful strategy for activating ultrastable fluorocarbons and offers a promising pathway toward sustainable degradation of persistent perfluorinated pollutants.