Photocatalysts such as titanium dioxide that use sunlight to split water and produce hydrogen would be a clean and sustainable solution to many problems, but their efficiency is currently too low to be widely used. Two approaches to engineer the surface properties of titanium dioxide offer hope that its efficiency can be increased.
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Diebold, U. Closing the gap. Nature Chem 3, 271–272 (2011). https://doi.org/10.1038/nchem.1019
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DOI: https://doi.org/10.1038/nchem.1019