Water Splitting for Solar Energy Conversion - Toward Robust Water Oxidation Catalysts
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Archívum: MTA Könyvtár
Gyűjtemény: Status = Published

Type = Conference or Workshop Item
Cím:
Water Splitting for Solar Energy Conversion - Toward Robust Water Oxidation Catalysts
Létrehozó:
Pap, József Sándor
Dátum:
2015
Téma:
QD Chemistry / kémia
Tartalmi leírás:
Limited supplies of fossil fuels and major environmental problems caused by CO2 direct attention to the renewable energy sources. Besides using CO2 in a sustainable way, eliminating carbon from the energy cycle may be a reasonable solution, too. Photocatalytic water splitting that provides H2 as solar fuel is attractive for many reasons. Fuel cells that burn H2 into H2O have been developed for long and applied widely; moreover, water is a ubiquitous and environmentally friendly compound. It is generally accepted that water splitting requires efficient catalysts for two half-reactions: reduction of protons to H2 and oxidation of water to O2 [1].
Water oxidation catalysts (WOCs) have been studied for three decades in relation with the natural Oxygen Evolving Complex (OEC) of photosystem II [2]. The biotic catalytic center is a Mn4Ca cluster that is capable of oxidizing water molecules to gain reducing equivalents for carbohydrate synthesis. The OEC has inspired several artificial models that can be useful in water splitting chemistry. Attention is shifting nowadays from the longest known Ru-based molecular catalysts to heterogeneous catalysis built on first row transition metals Mn, Fe, Co, Ni and Cu, as the latters provide a more economical alternative [3]. Yet, homogeneous catalytic systems should not be omitted, since fundamental information on factors directly governing efficiency at the metal center contribute significantly to our knowledge.
The greatest challenge in water oxidation is how to form an O=O bond and transfer four electrons and the coupled protons with retaining the efficiency and longevity of the catalytic center. In my lecture I wish to focus on recent advancement in the field of WOCs and draft potential directions towards further improvements.
Acknowledgement: The author is supported by the János Bolyai Scolarship of the Hungarian Academy of Sciences.
References:
[1] P. Du, R. Eisenberg, Energy Environ. Sci. 5, 6012 (2012).
[2] I. McConnell, G. Li, G. W. Brudvig, Chem. Biol. 17, 434 (2010).
[3] V. Artero, M. Fontecave, Chem. Soc. Rev. 42, 2338 (2013).
Típus:
Conference or Workshop Item
NonPeerReviewed
Formátum:
text
Azonosító:
Pap, József Sándor (2015) Water Splitting for Solar Energy Conversion - Toward Robust Water Oxidation Catalysts. In: 3rd European Energy Conference, 2013.10.27-30., Budapest, Hungary.
Kapcsolat: