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Review / Greg P. Smestad in Industrial & engineering chemistry research, Vol. 51 N° 37 (Septembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 37 (Septembre 2012) . - pp. 11828–11840 Titre : Review : Photochemical and thermochemical production of solar fuels from H2O and CO2 using metal oxide catalysts Type de document : texte imprimé Auteurs : Greg P. Smestad, Auteur ; Steinfeld, Aldo, Auteur Année de publication : 2012 Article en page(s) : pp. 11828–11840 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Photochemical  Thermochemical  Production Résumé : Metal oxides are reviewed as catalysts to convert H2O and CO2 to fuels using solar energy. For photochemical conversion, TiO2 has been found to be the most stable and useful oxide material, but it is currently limited by its large bandgap and a mismatch between its conduction band and the redox couples for water splitting and CO2 reduction. A theoretical framework has been utilized to understand the basic thermodynamics and energetics in photochemical energy conversion systems. This is applied to model systems comprised of Ag2O and AgCl to examine why the former reacts thermochemically in air, while the latter reacts photochemically. For thermochemical conversion, zinc-, ceria-, and ferrite-based redox cycles are examined and examples of high-temperature solar reactors driven by concentrated solar radiation are presented. For CO2 splitting, theoretical solar-to-fuel energy conversion efficiencies can be up to 26.8% for photochemical systems, and can exceed 30% for thermochemical systems, provided that sensible heat is recovered between the redox steps. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3007962 [article] Review : Photochemical and thermochemical production of solar fuels from H2O and CO2 using metal oxide catalysts [texte imprimé] / Greg P. Smestad, Auteur ; Steinfeld, Aldo, Auteur . - 2012 . - pp. 11828–11840. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 37 (Septembre 2012) . - pp. 11828–11840 Mots-clés : Photochemical  Thermochemical  Production Résumé : Metal oxides are reviewed as catalysts to convert H2O and CO2 to fuels using solar energy. For photochemical conversion, TiO2 has been found to be the most stable and useful oxide material, but it is currently limited by its large bandgap and a mismatch between its conduction band and the redox couples for water splitting and CO2 reduction. A theoretical framework has been utilized to understand the basic thermodynamics and energetics in photochemical energy conversion systems. This is applied to model systems comprised of Ag2O and AgCl to examine why the former reacts thermochemically in air, while the latter reacts photochemically. For thermochemical conversion, zinc-, ceria-, and ferrite-based redox cycles are examined and examples of high-temperature solar reactors driven by concentrated solar radiation are presented. For CO2 splitting, theoretical solar-to-fuel energy conversion efficiencies can be up to 26.8% for photochemical systems, and can exceed 30% for thermochemical systems, provided that sensible heat is recovered between the redox steps. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3007962