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Title: Solar photochemical and thermochemical splitting of water
Authors: Rao, C. N. R.
Lingampalli, S. R.
Dey, Sunita
Roy, Anand
Keywords: hydrogen production
oxidation of water
photocatalytic water splitting
thermochemical CO2 splitting
thermochemical water splitting
Photocatalytic Hydrogen Evolution
Lanthanum Manganite Perovskites
Ceria/Zirconia Solid-Solutions
Light-Induced Generation
Artificial Photosynthesis
Nonstoichiometric Ceria
H-2 Generation
Issue Date: 2016
Publisher: The Royal Society
Citation: Rao, C. N. R.; Lingampalli, S. R.; Dey, S.; Roy, A., Solar photochemical and thermochemical splitting of water. Philosophical Transactions of the Royal Society a-Mathematical Physical and Engineering Sciences 2016, 374 (2061), 19
Philosophical Transactions of the Royal Society A-Mathematical Physical and Engineering Sciences
Abstract: Artificial photosynthesis to carry out both the oxidation and the reduction of water has emerged to be an exciting area of research. It has been possible to photochemically generate oxygen by using a scheme similar to the Z-scheme, by using suitable catalysts in place of water-oxidation catalyst in the Z-scheme in natural photosynthesis. The best oxidation catalysts are found to be Co and Mn oxides with the e(g)(1) configuration. The more important aspects investigated pertain to the visible-light-induced generation of hydrogen by using semiconductor heterostructures of the type ZnO/Pt/Cd1-xZnxS and dye-sensitized semiconductors. In the case of heterostructures, good yields of H-2 have been obtained. Modifications of the heterostructures, wherein Pt is replaced by NiO, and the oxide is substituted with different anions are discussed. MoS2 and MoSe2 in the 1T form yield high quantities of H-2 when sensitized by Eosin Y. Two-step thermochemical splitting of H2O using metal oxide redox pairs provides a strategy to produce H-2 and CO. Performance of the Ln(0.5)A(0.5)MnO(3) (Ln= rare earth ion, A= Ca, Sr) family of perovskites is found to be promising in this context. The best results to date are found with Y0.5Sr0.5MnO3.
Description: Restricted Access
ISSN: 1364-503X
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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