New technique gets pure hydrogen out of splitting water

Physically separates the oxygen and hydrogen production steps using chemistry.

At some point in the future, filling up could actually involve giving your car the gas.

Continued concerns about global warming have boosted work on alternative fuel sources that reduce emissions. Hydrogen is an appealing, clean-burning fuel. Currently, most hydrogen comes from the processing of fossil fuels, which produces carbon dioxide as a byproduct. However, the electrolysis of water produces hydrogen without the release of greenhouse gases—provided the electricity used in the process comes from renewable energy.

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