Abstract
A new mechanism for light-driven water splitting is described, which decreases the reaction's complexity and offers a new way to extend the range of usable wavelengths far into the visible region.
Highlights
Theoretical modelling shows that two-photon water splitting can be used to achieve a maximum solar-to-hydrogen efficiency of 18.8%, which could be increased further to 28.6% through photochemical instead of thermal H2 release
Based on a detailed kinetic, spectroscopic and computational study of Milstein’s ruthenium complex, we report a new mechanistic paradigm for water splitting, which requires only two photons and offers a new method to extend the range of usable wavelengths far into the visible region
We describe a new mechanistic paradigm for overall water splitting, which requires absorption of only two photons and presents a new method to extend the range of usable wavelengths far into the visible region
Summary
Theoretical modelling shows that two-photon water splitting can be used to achieve a maximum solar-to-hydrogen efficiency of 18.8%, which could be increased further to 28.6% through photochemical instead of thermal H2 release. Paper formation of an intermediate, which absorbs a second, longer wavelength photon to complete the water splitting reaction.
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