Building the confined CoS2/MoS2 nanoreactor via interface electronic reconfiguration to synchronously enhance activity and stability of heterogeneous Fenton-like reactions

Herein, we synthesized CoS2/MoS2 catalysts with vertical interface structures to enhance peroxymonosulfate (PMS) activation. The characterization, experimental, and calculation results jointly reveal that the strong interface interaction (Co−S−Mo bond) regulates the electronic structure of CoS2/MoS2 to optimize the generation process of the main reactive oxygen species (SO4•−) and stabilizes the coordination structure of the active sites to greatly improve catalytic robustness. The unique interface structure of CoS2/MoS2 constructs the confined nanoreactor to adsorb pollutants and capture pollutant electrons,whcih can shorten the migration distance of SO4•− and improve the electron transfer rate, ultimately increasing the utilization and conversion rate of PMS. CoS2/MoS2 achieved outstanding activity (0.302 min−1), stability (93% of reactivity maintained after eight runs), and acid-base resistance (working pH range 3–11) for sulfamethazine degradation. This work provides a clear perspective for the rational design and optimization of interface engineering-mediated dual component catalysts in the Fenton-like reactions.