Journal
SCIENCE
Volume 338, Issue 6112, Pages 1321-1324Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1227775
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Funding
- Office of Basic Energy Sciences, U.S. Department of Energy [DE-FG02-09ER16121, DE-SC0002106]
- U.S. Department of Energy (DOE) [DE-SC0002106] Funding Source: U.S. Department of Energy (DOE)
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Homogeneous systems for light-driven reduction of protons to H-2 typically suffer from short lifetimes because of decomposition of the light-absorbing molecule. We report a robust and highly active system for solar hydrogen generation in water that uses CdSe nanocrystals capped with dihydrolipoic acid (DHLA) as the light absorber and a soluble Ni2+-DHLA catalyst for proton reduction with ascorbic acid as an electron donor at pH = 4.5, which gives >600,000 turnovers. Under appropriate conditions, the precious-metal-free system has undiminished activity for at least 360 hours under illumination at 520 nanometers and achieves quantum yields in water of over 36%.
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