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Solar photochemical and thermochemical splitting of water.
- Source :
-
Philosophical transactions. Series A, Mathematical, physical, and engineering sciences [Philos Trans A Math Phys Eng Sci] 2016 Feb 28; Vol. 374 (2061). - Publication Year :
- 2016
-
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(1) g 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 H2 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 H2 when sensitized by Eosin Y. Two-step thermochemical splitting of H2O using metal oxide redox pairs provides a strategy to produce H2 and CO. Performance of the Ln0.5A0.5MnO3 (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.<br /> (© 2016 The Author(s).)
- Subjects :
- Catalysis
Cobalt radiation effects
Hot Temperature
Hydrogen chemistry
Hydrogen radiation effects
Light
Manganese Compounds radiation effects
Oxides radiation effects
Oxygen chemistry
Oxygen radiation effects
Photochemistry methods
Semiconductors
Solar Energy
Cobalt chemistry
Hydrogen isolation & purification
Manganese Compounds chemistry
Oxides chemistry
Oxygen isolation & purification
Photochemical Processes radiation effects
Water chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1364-503X
- Volume :
- 374
- Issue :
- 2061
- Database :
- MEDLINE
- Journal :
- Philosophical transactions. Series A, Mathematical, physical, and engineering sciences
- Publication Type :
- Academic Journal
- Accession number :
- 26755752
- Full Text :
- https://doi.org/10.1098/rsta.2015.0088