Spin-state regulation-enhanced piezoelectric-polarization-driven catalytic kinetics in 1T-dominant MoS2

Abstract

1T-dominant MoS2, owing to its relatively high electrical conductivity, facilitates charge transport induced by piezoelectric polarization; however, the reaction kinetics are still constrained by rapid charge-carrier recombination. In this work, a 1T-dominant MoS2 piezocatalytic system was constructed, and Fe was introduced to regulate the local electronic structure and magnetic-related characteristics. Magnetic measurements reveal that Fe doping effectively tunes the effective magnetic moment of the material. Under ultrasonic excitation, compared with pristine MoS2, high-spin 10% Fe-MoS2 exhibits markedly enhanced piezocatalytic kinetics (approximately a 200% increase in the reaction rate), enabling second-level degradation of rhodamine B while maintaining excellent structural stability before and after the reaction. These results demonstrate a close correlation between the regulation of magnetic-related properties and piezoelectric-polarization-driven catalytic behavior, providing a new physical perspective for tuning carrier dynamics in mechanically driven catalytic systems.