Recent Advances in Electrochemical Ozone Production (EOP) in Pure Water Systems

Electrochemical ozone production (EOP) for generating ozone (O3) directly in pure water presents a sustainable alternative to conventional methods. This review focuses on the advanced Membrane Electrode Assembly (MEA) electrolyzer, analyzing its fundamental thermodynamics, mechanisms, and key performance indicators. The core discussion centers on the MEA architecture, with an in-depth critique of anode catalysts (including cost-effective alternatives) and strategies to enhance O3 selectivity over the competing oxygen evolution reaction. The role of the solid polymer electrolyte membrane is also examined. Furthermore, the review assesses how operational parameters and detection methods determine overall system efficiency and stability. It concludes by identifying challenges and future directions, underscoring the potential of MEA-based EOP for practical, on-site O3 generation in pure water.