What is the material of the electrolyzer of the PEM hydrogen oxygen machine?
Jun 05,2025 | Dr.wellness hydrogen
The key components of our electrolyzer include proton exchange membrane, platinum iridium catalyst layer, gas diffusion layer and metal end plate. These components together form a complete membrane electrode assembly, which is responsible for material transmission and electrochemical reaction. Specifically:
- Proton exchange membrane: located in the center, responsible for conducting protons and isolating hydrogen and oxygen.
- Catalytic layer: close to the proton exchange membrane, containing high-efficiency catalyst, promoting the oxidation reaction of water molecules at the anode and the reduction reaction at the cathode.
Iridium is usually used as the anode catalyst of PEM electrolyzer, responsible for oxidizing water to produce hydrogen.
Platinum is usually used as the cathode catalyst of PEM electrolyzer, responsible for electrolyzing water to produce oxygen.
- Gas diffusion layer: located on both sides of the catalyst layer, ensuring the effective transmission of gas and liquid, while providing mechanical support.
- End plate: the outermost layer (aluminum alloy), providing structural stability for the electrolyzer.
The characteristics and structural design of the membrane electrode assembly are crucial to the overall performance and service life of the PEM water electrolyzer.
By carefully designing these components, first, the electrolysis efficiency can be significantly improved, energy consumption can be reduced, and the service life of the electrolyzer can be extended.
Second, it can withstand high pressure, with the highest pressure value reaching 2Mpa.
Third, the purity of hydrogen and oxygen gas is high, reaching more than 99.99%.
Fourth, the water circulation is fast, not easy to overheat, and can prevent backflow and dry burning.
Fifth, it can effectively separate the gas, thereby improving the safety of the electrolyzer and preventing direct electron transfer.
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