Journal
ACS CATALYSIS
Volume 3, Issue 7, Pages 1486-1503Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cs4002089
Keywords
artificial photosynthesis; electron relay; heterogeneous photocatalysis; hydrogen evolution; light energy conversion; solar fuel; water oxidation
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Funding
- PRESTO/JST
- Japan Society for the Promotion of Science (JSPS) [21850009]
- Grants-in-Aid for Scientific Research [21850009] Funding Source: KAKEN
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Water splitting on illuminated semiconductors his long been studied as a potential means of converting solar energy into chemical energy in the form of H-2, a clean and renewable energy carrier. Photocatalytic water splitting through two-step photoexcitation using two different semiconductor powders and a reversible donor/acceptor pair (so-called shuttle redox mediator) is one of the possible forms of artificial photosynthesis. This system was inspired by natural photosynthesis in green plants and is called the Z-scheme. The development of Z-scheme water splitting systems has relied on both finding a new semiconductor photocatalyst that efficiently works in the presence of a shuttle redox mediator and creating active Sites to promote surface chemical reactions while suppressing backward reactions involving redox mediators. This review article describes the historical development of photocatalytic water splitting systems driven by the Z-scheme principle.
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