Testing Cells for Col Electrolyzers & Fuel Cells

Testing cells decide whether your catalyst, membrane, or flow field actually works — and whether your data is publishable. A research-grade fixture controls active area, clamping pressure, gas and liquid feeds, and reference-electrode placement so that the numbers you report reflect the chemistry, not the hardware. This collection groups testing cells used across electrolyzer and fuel-cell research, including CO2 reduction, water electrolysis, redox-flow, photoelectrochemistry, corrosion screening, and operando characterization.

Beaker and three-electrode cells

Glass cells with three to five ports remain the workhorse for fundamental kinetics, catalyst screening, and reference measurements. Five-port bodies give you working, counter, and reference seats plus two auxiliary ports for purge, vent, or temperature probes; flat corrosion cells clamp a sheet specimen against an O-ring so that active area and edge masking are defined by geometry rather than tape.

Flow cells and electrolyzer hardware

Flow geometries dominate CO2 reduction, alkaline and PEM water electrolysis, and reactive capture & conversion (RCC) work. Cells in this section accept gas-diffusion electrodes or membrane-electrode assemblies between machined flow plates with serpentine, parallel, or interdigitated channels. Integrated capture-and-conversion cells route amine carbamate or bicarbonate streams directly to the cathode, while porous solid-electrolyte (PSE) reactors sandwich a sulfonated PFSA or ceramic conductor around a porous middle chamber to deliver salt-free liquid products.

Redox-flow stacks

Single-cell and short-stack RFB fixtures evaluate membranes, carbon-felt or carbon-paper electrodes, and bipolar plates under realistic shear and pressure drop. Serpentine flow channels are standard for benchmarking; parallel channels appear when low pumping loss matters more than mass transport.

Operando and visualization cells

For mechanism work, this collection includes flow electrolyzers with quartz windows, PEC-EC hybrid cells with tandem photoelectrodes and double-side quartz access, ATR-IR split cells, X-ray-transparent CT cells, and Swagelok cells with sapphire or quartz apertures. These fixtures trade some idealized geometry for direct optical, IR, or X-ray access during cycling.

If you are screening catalysts, start with a five-port glass cell or flat corrosion cell; for membrane and GDE benchmarking, move to a flow electrolyzer or RFB stack. Pair your hardware with the matching membranes, gas-diffusion layers, and reference electrodes.