Researchers say their prototype produces hydrogen with greater than 99% purity and works in air as dry as 4% relative humidity
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Researchers have created a solar-powered device that produces hydrogen fuel directly from moisture in the air.
According to its inventors, the prototype produces hydrogen with greater than 99% purity and can work in air that is as dry as 4% relative humidity. The device would allow hydrogen to be produced without carbon emissions even in regions where water on land is scarce, they say.