Interfacial electronic coupling in accordion-like Ni@Ti3C2TX heterostructures: Accelerating the Ni2+/Ni3+ redox cycle for enhanced peroxymonosulfate activation

2026-08-05

PRE

Zhen Li

Ding Huang

Weidong Gu

Xinyan Niu

Yunbo Wang

Jing Zhao

Manhong Huang

Guanghui Li

Jun Li *

DOI：10.1016/j.jwpe.2026.110720

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• Accordion-like Ni@Ti3C2TX composites were engineered via a facile strategy. • The conductive MXene acts as an “electron reservoir” to boost Ni2+/Ni3+ cycles. • Strong metal-support interaction optimizes the Ni d-band center for PMS activation. • Near-complete degradation of SMX was achieved within 10 min with low Ni leaching. • The radical-dominated pathway involves synergistic effects of SO4•- and •OH.

Keywords:

Interfacial electronic interaction

Electron transfer mechanism

DFT calculation

Ti3C2TX MXene

Peroxymonosulfate activation

Ni nanoparticles

Interfacial electronic coupling in accordion-like Ni@Ti3C2TX heterostructures: Accelerating the Ni2+/Ni3+ redox cycle for enhanced peroxymonosulfate activation

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