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A molecular ruthenium catalyst with water-oxidation activity comparable to that of photosystem II
- A molecular ruthenium catalyst with water-oxidation activity comparable to that of photosystem II
- Duan L.; Bozoglian F.; Mandal S.; Stewart B.; Privalov T.; Llobet A.; Sun L.
- Ewha Authors
- Antoni Llobet
- Issue Date
- Journal Title
- Nature Chemistry
- vol. 4, no. 5, pp. 418 - 423
- SCI; SCIE; SCOPUS
- Across chemical disciplines, an interest in developing artificial water splitting to O 2 and H 2, driven by sunlight, has been motivated by the need for practical and environmentally friendly power generation without the consumption of fossil fuels. The central issue in light-driven water splitting is the efficiency of the water oxidation, which in the best-known catalysts falls short of the desired level by approximately two orders of magnitude. Here, we show that it is possible to close that 'two orders of magnitude' gap with a rationally designed molecular catalyst [Ru(bda)(isoq) 2] (H 2 bda = 2,2'-bipyridine-6,6'- dicarboxylic acid; isoq = isoquinoline). This speeds up the water oxidation to an unprecedentedly high reaction rate with a turnover frequency of >300 s -1. This value is, for the first time, moderately comparable with the reaction rate of 100-400s -1 of the oxygen-evolving complex of photosystem II in vivo. © 2012 Macmillan Publishers Limited. All rights reserved.
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