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NREL advances green hydrogen production method

Perovskite materials may hold the potential to play an important role in a process to produce hydrogen in a renewable manner, according to analysis from scientists at the National Renewable Energy Laboratory (NREL).

The NREL team analyzed an emerging water-splitting technology called solar thermochemical hydrogen (STCH) production. The technique potentially can be more energy efficient than producing hydrogen via the more commonly used electrolysis method.

Electrolysis needs electricity to split water into hydrogen and oxygen. STCH relies on a two-step chemical process in which metal oxides are exposed to temperatures greater than 1,400 degrees Celsius and then re-oxidized with steam at lower temperatures to produce hydrogen.

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