Researchers have taken a step closer to matching photosynthesis in the quest to generate hydrogen fuel by harvesting sunlight, according to Gary Moore of Berkeley Lab's Physical Biosciences Division. The key is a photocathode made of the semiconductor gallium phosphide and a molecular cobalt-containing hydrogen production catalyst. It's one stage in the development of a bionic leaf that could produce fuel from a simple, non-polluting combination of sunlight, water and CO2.

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