Cleaner Tech
A Green Hydrogen Economy Depends on This Little-Known Machine
The electrolyzer, obscure for decades, sees its sales soar. Here’s how the technology works.

A Plug Power Inc. electrolyzer stack at the company’s Concord, Massachusetts, facility. Electrolyzers, which use electricity to split water into hydrogen and oxygen, are a building block of a green hydrogen economy.
Photographer: Adam Glanzman/BloombergSign up to receive the Bloomberg Green newsletter in your inbox.
Solar power depends on the solar cell. Wind power, the wind turbine.