ABSTRACT
Electrolysis of water is a method of producing hydrogen, and by-product oxygen, by the direct decomposition of water molecules using electric energy. Water electrolysis was already commercially practiced in 1890s. Some installations were operating around the beginning of the twentieth century. In the 1920s and 1930s, several plants in over 10 MWe size were constructed [1]. Industrial research and development to improve the economical performance of the method have continued to this very date. The newly developed electrolysis cells include the high-pressure designs and state-of-the-art membrane electrolyte designs.
