H2GN catalysts and electrodes
Critical-raw-material-free hydrogen-evolution catalysts and spray-printed coated cathodes, matched to AionFLX™ membranes and OXYGN anodes.
what it is
H2GN is CENmat’s hydrogen-evolution (HER) catalyst line for AEM electrolysis and related reduction electrodes, made without critical raw materials.
It is offered as catalyst and as spray-printed coated substrates matched to AionFLX™ and OXYGN, so membrane and both electrodes can be qualified as one system rather than with three vendors.
Using the same spray-printing process as OXYGN keeps anode and cathode formats aligned, from small test cells up to the largest coated area CENmat supplies.
Applications
- Cathodes for AEM water electrolysis
- PGM-free cathode benchmarking
- Reduction electrodes in alkaline cells (R&D)
- Matched electrode sets for short-stack builds
Formats and supply
- Catalyst powder
- Spray-printed coated substrates (substrate per datasheet)
- Matched OXYGN/H2GN electrode sets
key specifications
2.01 V*
at 2 A/cm² in full cell
* 50 °C, 0.1 M KOH
6 kW
short stack validated
PGM-free
no platinum-group metals
| Parameter | Value | Conditions |
|---|---|---|
| Catalyst type | Hydrogen evolution (HER); free of platinum-group metals and critical raw materials | |
| Formats | Powder; catalyst-coated substrates up to 400 cm² | |
| Cell performance | 2.01 V at 2 A/cm²* | * 50 °C, 0.1 M KOH |
| Degradation | < 5 µV/h over 330 h* | * 50 °C, 0.1 M KOH |
| Scale-up | Validated at 400 cm² and in a 6 kW short stack |
* Test conditions. Performance depends on cell hardware and operating conditions. Values marked “Target” are project targets. Full datasheet on request.
how to qualify
- Tell us your cell or stack format, operating window (electrolyte, temperature, pressure) and test plan.
- We recommend a matched set (membrane, ionomer, OXYGN anode, H2GN cathode) and send the datasheet.
- Order a paid sample set and run your break-in, polarisation and durability protocol.
- Review the results with our team and agree formats, volumes and lead times for the next step.
AEM qualification pack
Product overview, recommended test protocol and spec summary as a PDF.
frequently asked questions
Is H2GN free of platinum-group metals?
Yes. H2GN is made without critical raw materials, including platinum-group metals.
Can I order matched anode and cathode sets?
Yes. OXYGN anodes and H2GN cathodes are produced with the same spray-printing process and can be ordered as a matched set in the same format.
Which cell sizes do you support?
From laboratory test cells upwards. The maximum coated area and throughput are listed in the specification table.
How are samples priced?
Samples are paid and prices are on request. Use the sample form and we reply personally.
related products
CRM-free anodes for AEM
OXYGN catalysts and electrodes (AEM)
CRM-free oxygen-evolution catalyst and coated anodes.
Learn more →AEM membranes
AionFLX™ anion-exchange membranes
PFAS-free anion-exchange membranes for AEM electrolysers; wet or dry assembly.
Learn more →AEM ionomers and binders
AionFLX™ ionomers
Matched PFAS-free binder for AEM catalyst layers, electrodes and inks.
Learn more →EU research projects with CENmat participation
Next step
Paid samples. Prices on request. We reply personally. All products · AEM vs PEM iridium calculator