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RESEARCHJuly 10, 2009Pressure plus light pulls hydrogen from waterPut water under pressure and shine light on it and you could have a clean way to generate hydrogen for fuel.Very high pressure can force molecules together so closely that their chemical bonds rearrange and different molecules are formed. Using light lowers the amount of pressure needed to trigger the reactions. When a mixture of water and nitrogen or water and carbon monoxide is under 4,000 to 6,000 atmospheres of pressure and under near-ultraviolet light, it undergoes chemical transformations. One of the products is molecular hydrogen. The pressure involved sounds like a lot, but it's well within the realm of widely used industrial equipment. This makes large-scale sustainable hydrogen production possible. Research paper: High-pressure photodissociation of water as a tool for hydrogen synthesis and fundamental chemistry Proceedings of the National Academy Of Sciences, published online July 6, 2009 Researchers' contact: Roberto Bini Related stories and briefs: Metal heats up water splitting -- related research Back to ERN home |
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