Enhanced electrochemical O2 reduction to H2O2 through resilient hybrid catalysts modified with DMSO in electro-Fenton

In the face of challenges presented by rapid urbanization and industrialization, the surge in dye wastewater has emerged as a prominent concern. This study introduces a pioneering novel approach aimed at augmenting the electrocatalytic efficiency of O2 reduction to H2O2 through the modification of a hybrid catalyst with dimethyl sulfoxide (DMSO) to construct gas diffusion electrodes (GDEs). The hybrid catalyst, consisting of carbon black and DMSO, was meticulously fabricated, and its electrocatalytic activity was thoroughly investigated using various characterization techniques. Within 180 min, the 3 %DM cathode showcased efficient H2O2 generation, reaching 850 μM, and remarkable oxygen utilization, achieving 60.49 %. Intriguingly, the fabricated 3 %DM hybrid catalyst maintained a three-phase interfacial (TPI) due to its super-hydrophilic property. This study elucidates the pivotal role of DMSO in enhancing the performance of hybrid catalysts for O2 reduction to H2O2. The insights provide valuable perspectives into the development of efficient and resilient electrochemical systems for sustainable energy conversion and environmental applications.