Magnetic-Field-Assisted Cascade Electrocatalysis: Simultaneous H2O2 Generation and ·OH Radical Production for Coupled Hydrogen Evolution and Water Disinfection

Abstract

Current research on green hydrogen mainly focuses on water electrolysis. However, the low commercial utility of oxygen hinders the reduction of hydrogen production costs. Herein, we report a bifunctional Mn-SnO2@Fe3O4 catalyst for simultaneous hydrogen production and water disinfection. Under an external magnetic field, the system triggers a cascade reaction, converting in-situ generated H2O2 into ·OH radicals via a Fenton-like reaction. This synergy achieved 99.9% antibacterial efficacy against Escherichia coli at 2.6 V vs. RHE.