因此,该研究小组还需要证明,使用水也能进行同样的反应。如果能够成功,他们将能够给工厂提供新的绿色技术。作者: small 时间: 2012-11-13 13:07
Robust Photogeneration of H2 in Water Using Semiconductor Nanocrystals and a Nickel Catalyst
Homogeneous systems for light-driven reduction of protons to H2 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 nm and achieves quantum yields in water of over 36%.