Lab-Scale Electrochemical Ozone Generator, CLSEOG

An electrochemical ozone generator (EOG) is essentially a highly specialized Proton Exchange Membrane (PEM) water electrolyzer. Instead of being optimized to produce hydrogen and oxygen gas, it is intentionally engineered with specific catalysts and high voltages to push the anodic reaction further, converting water directly into ozone (O3). Unlike traditional "corona discharge" ozone generators—which zap dry air or oxygen gas with high-voltage sparks and often create toxic nitrogen oxide (NOx) byproducts—electrochemical generators produce ozone directly from, and dissolved directly into, water.

In a standard PEM electrolyzer, the goal at the anode is the Oxygen Evolution Reaction (OER), which produces O2. To produce ozone, the cell must be driven to a significantly higher thermodynamic potential to force the formation of the triatomic O3 molecule. To suppress oxygen generation, the anode must be constructed from a material with a very high "oxygen evolution overpotential." This means the material is highly resistant to forming O2, allowing the voltage to climb high enough to trigger the O3 reaction instead.

There are two primary materials used for this in commercial flow-through or filter-press EOGs: (1) Boron-Doped Diamond (BDD): As discussed in the context of wastewater treatment, BDD has an exceptionally wide electrochemical window. It can handle the extreme anodic voltages required to generate ozone (and hydroxyl radicals) without breaking down or defaulting to bulk oxygen production. It is the premium standard for modern EOGs. (2) Lead Dioxide (PbO2): Historically the most common catalyst for electrochemical ozone generation. It is cheaper than BDD and naturally possesses a high overpotential for oxygen evolution. However, its use is declining in drinking water or medical applications due to the risk of trace lead leaching into the water stream over time.

Part Number	CLSEOG (C-LSEOG)
Structure/Components	Current Collector/Flow Channel: one piece of SS316L plate. Active area: 2.8cm * 2.8cm Catalyst was loaded on Ti felt is included.  Zero gap between electrode plates Electrode Gasket: PTFE Tubing Connection: Barbed hose fitting (connecting tube I.D. 4 mm. O.D. 6 mm)  M4 tighten screw (4 pieces)
Assembling Diagram
Flow Pump (Optional)	The flow pump can be supplied upon request
Note	The cell components should be thoroughly cleaned and dried after use.

References:

1. X. Wang, et al. A long-term-stable continuous flow electrochemical ozone generator with high current efficiency, Sustainable Energy Fuels, 2023,7, 2680-2689. 
2. X. Wang, et. al., Fabrication of Novel 3D Star-Like PbO2 Nanospheres for Enhanced Electrochemical Ozone Production, J. Electrochem. Soc., 2022, 169, 106503.
3. J. Liu, et al., Electrochemical ozone production: from fundamental mechanisms to advanced applications, EES Catal., 2025, 3, 170-204.