Porous Solid Electrolyte (PSE) Reactors
PSE reactors are electrochemical devices that eliminate the liquid catholyte layer entirely, enabling direct synthesis of high-purity, concentrated liquid chemicals such as formic acid or hydrogen peroxide, straight from gas-phase inputs.
Standard GDE flow cells solve the mass-transport problem for gas-phase reactants, but the liquid product they generate still ends up diluted in a flowing catholyte stream, mixed with supporting electrolyte salts. Separating that product back out is often the most energy-intensive step in the whole process. PSE reactors solve this differently: a central porous solid electrolyte channel, typically made from a high-conductivity ion-exchange resin or polymer membrane, replaces the catholyte entirely. Ions generated at the cathode (H⁺ and HCOO⁻, for example) migrate into this central chamber and recombine there, forming a pure, concentrated liquid product that can be swept out using nothing more than deionised water or a gas carrier.
This also addresses a stability problem that limits long-run GDE flow cell operation: without a bulk liquid catholyte, there's no bulk phase for carbonate salts to precipitate into, so the flooding and salt-build up failures that limit continuous flow cell runs are largely avoided.
PSE reactors sit at the top of the scale-up path from H-cells through GDE flow cells and MEA electrolyzers, the step to take once your priority shifts from studying a reaction to producing a clean, separation-free liquid product from it. If you're still at the catalyst-screening or method-development stage, our GDE Flow Cells or MEA Electrolysers are the better starting point.
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Related categories: spectroelectrochemical cells, equipment accessories, electrodes, electrochemistry, GDE flow cells, MEA electrolyzers
Key Features
Central Porous Solid Electrolyte Channel: Replaces the liquid catholyte with a solid ion-exchange medium, removing the bulk liquid phase entirely.
Zero Catholyte Dilution: Generated ions migrate directly into a separate collection chamber rather than mixing into a flowing electrolyte.
Direct Pure-Product Collection: Product is recombined and collected using only deionised water or a carrier gas, with no downstream separation or distillation needed.
Improved Long-Run Stability: Managing pH internally, rather than through a bulk catholyte, reduces the carbonate salt build-up and flooding that limit extended GDE flow cell operation.
Advanced Phase Separation: Keeps gas feed and pure liquid products cleanly segregated for optimized mass transport and maximum reaction efficiency.
Streamlined Scale-Up: Offers the ideal testing architecture for transition from laboratory-scale catalyst screening to industrial-scale pilot deployment.
PSE Reactor Features
Our premier Porous Solid Electrolyte reactor (C2053S1) is engineered for researchers and engineers looking to bypass the mass-transport limits of H-cells, the dilution penalties of standard flow cells, and the carbonate built-up in standard MEA architecture.
| Porous Solid Electrolyte Flow Cell (C2053S1) | |
| Architecture | Three-chamber, zero-gap, central solid electrolyte |
| Channel Gap | 1.5 mm |
| Catholyte stream | None, replaced by central solid-electrolyte channel |
| Best for | Direct liquid synthesis (formic acid, H₂O₂) without downstream purification |
| Worth Knowing | More setup complexity than a single-channel flow cell; periodic membrane/resin replacement required |
Key Applications
PSE reactors are suited to liquid-product synthesis that flow cells and MEAs can't deliver at comparable purity.
High-Purity CO₂ Reduction (CO₂RR): Direct conversion of CO₂ into concentrated, electrolyte-free formic acid, acetic acid, or alcohols.
Hydrogen Peroxide Electrosynthesis (ORR): Production of pure, localised H₂O₂ streams via the two-electron oxygen reduction pathway.
Electrochemical Separation & Recovery: Capturing and concentrating valuable ions from dilute waste streams without introducing extra chemical solutes.
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