Molecular systems for light driven hydrogen production

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Abstract

Recent work towards the production of hydrogen via reduction of protons is described. Most of the systems examined in this perspective use a molecular chromophore for harvesting visible light, a catalyst, which is reduced by the excited (or reduced) chromophore, and finally a sacrificial electron source to oxidatively or reductively quench the chromophore. The reduced catalyst is then responsible for the reduction of protons resulting in hydrogen evolution. Relevant mechanistic work on this topic is also discussed.

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Artificial Photosynthesis: Solar Splitting of Water to Hydrogen and Oxygen

Marye Anne Fox, Allen J Bard (2002)

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Photosynthetic energy conversion: natural and artificial.

James Barber (2009)

Photosystem II (PSII) is the water splitting enzyme of photosynthesis. Its appearance during evolution dramatically changed the chemical composition of our planet and set in motion an unprecedented explosion in biological activity. Powered by sunlight, PSII supplies biology with the 'hydrogen' needed to convert carbon dioxide into organic molecules. The questions now are can we continue to exploit this photosynthetic process through increased use of biomass as an energy source and, more importantly, can we address the energy/CO2 problem by developing new photochemical technologies which mimic the natural system? (Critical review, 82 references).