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Water Electrolysis, is the process of applying a direct electrical current through an electrolyte to split water into hydrogen and oxygen.

Though research and development continues on modified and novel electrolysis processes, today there are two main types of commercial electrolyzers, Alkaline electrolyzers and Polymer Electrolyte Membrane electrolyzers (often called Proton Exchange Membrane electrolyzers or just “PEM” for short).

Icon of the electrolysis process resulting in H2 and O2

About these documents

This website centralises publications on hydrogen, with a particular focus on technology and especially safety.

The publications are issued by industrial gases associations or standardisation bodies.

Depending on the issuing organisation, some publications may not be available for free download.