Photosynthetic Hydrogen Production by a Hybrid Complex of Photosystem I and [NiFe]-Hydrogenase
Photosynthetic Hydrogen Production by a Hybrid Complex of Photosystem I and [NiFe]-Hydrogenase
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DOI：
10.1021/nn900748j
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发表时间：
2009-12-01
期刊：
影响因子：
17.1
通讯作者：
Heberle, Joachim
中科院分区：
文献类型：
--
作者：
Krassen, Henning;Schwarze, Alexander;Heberle, Joachim
大自然以酶纳米机器的形式提供了从可再生资源中产生燃料的关键成分，这些机器催化生物能量转化的关键步骤，例如将太阳能转化为化学能的光合装置和能够产生分子氢的氢化酶。由于阳光通常用于合成碳水化合物，因此从光直接产生氢在自然界中是一个例外。在分子水平上，光系统I与氢化酶的有效电子耦合是太阳能转化为H-2的关键步骤。在这里，我们显示了逐步组装的混合复合物组成的光系统I和氢化酶的固体金表面。该装置引起了光诱导的H-2释放。与先前描述的不采用光合作用装置的（生物）纳米电子器件相比，氢生产可能在高得多的电势下并且因此在低得多的能量下。高效的太阳能转化为氢的成功示范可以作为在具有自我复制的最大优势的活生物体中建立该系统的蓝图。
Nature provides key components for generating fuels from renewable resources in the form of enzymatic nanomachines which catalyze crucial steps in biological energy conversion, for example, the photosynthetic apparatus, which transforms solar power into chemical energy, and hydrogenases, capable of generating molecular hydrogen. As sunlight is usually used to synthesize carbohydrates, direct generation of hydrogen from light represents an exception in nature. On the molecular level, the crucial step for conversion of solar energy into H-2 lies in the efficient electronic coupling of photosystem I and hydrogenase. Here we show the stepwise assembly of a hybrid complex consisting of photosystem I and hydrogenase on a solid gold surface. This device gave rise to light-induced H-2 evolution. Hydrogen production is possible at far higher potential and thus lower energy compared to those of previously described (bio)nanoelectronic devices that did not employ the photosynthesis apparatus. The successful demonstration of efficient solar-to-hydrogen conversion may serve as a blueprint for the establishment of this system in a living organism with the paramount advantage of self-replication.