Container-type Hydrogen Generator Hydrogen Equipment

PEM water electrolyzer uses solid proton exchange membrane PEM as electrolyte and pure water as reactant. Due to the low hydrogen permeability of the PEM electrolyte, the purity of the hydrogen produced is high, and only water vapor needs to be removed, the process is simple and the safety is high; the electrolytic cell adopts a zero-pitch structure, and the ohmic resistance is low, which significantly improves the overall efficiency of the electrolysis process, and The volume is more compact; the pressure control range is large, and the hydrogen output pressure can reach several MPa, which is suitable for the rapidly changing renewable energy power input.

PEM Water Electrolysis Electrolyzer Principle：
The main structure of the electrolyzer is similar to that of a fuel cell stack, which is divided into membrane electrodes, plates and gas diffusion layers.
The anode of the PEM electrolyzer is in a strongly acidic environment (pH ≈ 2), and the electrolysis voltage is 1.4–2.0 V. Most non-noble metals will corrode and may combine with sulfonate ions in the PEM, thereby reducing the ability of the PEM to conduct protons.

The anode of PEM electrolyzed water needs to be resistant to acidic environment corrosion and high potential corrosion, and should have a suitable pore structure to allow gas and water to pass through. Limited by the reaction conditions of PEM water electrolysis, membrane electrode materials (such as carbon materials) commonly used in PEM fuel cells cannot be used as anodes for water electrolysis. 3M has developed a nanostructure thin film (NSTF) electrode. The cathode and anode use Ir and Pt catalysts respectively, with a loading capacity of 0.25 mg/cm2; it can work stably in acidic environments and high potential conditions, and the rod-like array structure on the surface is conducive to improving Catalyst surface dispersion.