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U. Diebold:
"Photocatalysts: Closing the gap";
Nature Chemistry, 3 (2011), 271 - 272.

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 e!ciency is currently too low to be widely used. Two approaches
to engineer the surface properties of titanium dioxide o"er hope that its e!ciency can be increased.