An electrolyzer is a device for carrying out electrolysis, a process in which electrical energy is used to cause a chemical reaction.
Typically, it is used to separate water H2O into hydrogen H2 and oxygen O2.
There are several types of electrolyzer, including alkaline electrolyzers, proton exchange membrane electrolyzers and high-temperature electrolyzers.
Electrolyzers are used in particular to produce hydrogen, used as a clean fuel in fuel cells and for energy storage.