Flow Cells
What are Flow Cells?
Offering higher efficiency, easier scalability, and real-time analysis, electrochemical flow cells are advanced electrochemical devices that are designed for green chemistry, clean energy and industrial gas conversions by passing an electrolyte solution continuously over electrodes under applied potential. While traditional standard H-cells require gases like carbon dioxide (CO₂) or oxygen (O₂) to dissolve in a liquid electrolyte first, flow cells feature a continuous supply of gas directly to the back of the electrode and a continuous liquid electrolyte across the front of the electrode. This creates a three-phase boundary where the gas, liquid, and solid catalyst meet inside the pores of the gas diffusion electrode (GDE), facilitating rapid electron transfer and chemical reactions.
Take electrochemical carbon dioxide reduction reaction for example, to improve the CO₂ conversion rate, electrochemical CO2RR is carried out using a continuous flow equipment to overcome the barrier of mass transport. providing a higher CO₂ concentration on the electrocatalyst surface and a much shorter transmission path, CO₂RR in flow cells make the industrial process of carbon dioxide reduction possible.
Key Features
Working Electrode (GDE): A hydrophobic GDE layer loaded with a catalyst. .
Liquid and Gas Chambers: To provide continuous flow of gas and liquid in separate chambers.
Three-phase Boundary: The gas and liquid phase meet at the solid catalyst surface where electrochemical reaction takes place.
Key Applications
Flow cells are widely performing heavy-duty electrochemical tasks where standard electrochemical cell fall short.
CO₂ Reduction (CO₂RR): Converting CO₂ into valuable industrial chemicals and fuels (like ethylene or formic acid).
Oxygen reduction (O2RR): Hydrogen peroxide (H₂O₂) production.
Water Electrolysis: Splitting water to produce clean hydrogen gas.
Fuel Cells & Metal-Air Batteries: Combining oxygen and hydrogen efficiently to generate electricity or store energy.
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Related categories: spectroelectrochemical cells, equipment accessories, electrodes, electrochemistry
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