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1,102 results on '"Fornasiero, Paolo"'

111. A Parametric Study of the Crystal Phases on Au/TiO 2 Photocatalysts for CO 2 Gas-Phase Reduction in the Presence of Water.

Author

Marchal, Clément, Mary, Caroline, Hammoud, Leila, Xi, Qingyang, Toufaily, Joumana, Hamieh, Tayssir, Suhadolnik, Luka, Fornasiero, Paolo, Colbeau-Justin, Christophe, Caps, Valérie, Cottineau, Thomas, and Keller, Valérie

Subjects
CARBON dioxide, TITANIUM dioxide, PHOTOREDUCTION, CRYSTALS, CHARGE carriers
Abstract

Au/TiO2 photocatalysts were studied, characterized, and compared for CO2 photocatalytic gas-phase reduction. The impact of the nature of the TiO2 support was studied. It was shown that the surface area/porosity/TiO2 crystal phase/density of specific exposed facets and oxygen vacancies were the key factors determining CH4 productivity under solar-light activation. A 0.84 wt.% Au/TiO2 SG (Sol Gel) calcined at 400 °C exhibited the best performance, leading to a continuous mean CH4 production rate of 50 μmol.h−1.g−1 over 5 h, associated with an electronic selectivity of 85%. This high activity was mainly attributed to the large surface area and accessible microporous volume, high density of exposed TiO2 (101) anatase facets, and oxygen vacancies acting as reactive defects sites for CO2 adsorption/activation/dissociation and charge carrier transport. [ABSTRACT FROM AUTHOR]

Published
2022
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129. Hydrogen and chemicals from alcohols through electrochemical reforming by Pd-CeO2/C electrocatalyst

Author

Bellini, Marco, primary, Pagliaro, Maria V., additional, Marchionni, Andrea, additional, Filippi, Jonathan, additional, Miller, Hamish A., additional, Bevilacqua, Manuela, additional, Lavacchi, Alessandro, additional, Oberhauser, Werner, additional, Mahmoudian, Jafar, additional, Innocenti, Massimo, additional, Fornasiero, Paolo, additional, and Vizza, Francesco, additional

Published
2021
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145. Tailored amorphization of graphitic carbon nitride triggers superior photocatalytic C–C coupling towards the synthesis of perfluoroalkyl derivatives

Author

Longobardo, Francesco, primary, Gentile, Giuseppe, additional, Criado, Alejandro, additional, Actis, Arianna, additional, Colussi, Sara, additional, Dal Santo, Vladimiro, additional, Chiesa, Mario, additional, Filippini, Giacomo, additional, Fornasiero, Paolo, additional, Prato, Maurizio, additional, and Melchionna, Michele, additional

Published
2021
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146. Electron localization determines defect formation on ceria substrates

Author

Esch, Friedrich, Fabris, Stefano, Zhou, Ling, Montini, Tiziano, Africh, Cristina, Fornasiero, Paolo, Comelli, Giovanni, and Rosei, Renzo

Subjects
Cerium -- Properties, Science and technology, Properties
Abstract

The high performance of ceria (Ce[O.sub.2]) as an oxygen buffer and active support for noble metals in catalysis relies on an efficient supply of lattice oxygen at reaction sites governed by oxygen vacancy formation. We used high-resolution scanning tunneling microscopy and density functional calculations to unravel the local structure of surface and subsurface oxygen vacancies on the (111) surface. Electrons left behind by released oxygen localize on cerium ions. Clusters of more than two vacancies exclusively expose these reduced cerium ions, primarily by including subsurface vacancies, which therefore play a crucial role in the process of vacancy cluster formation. These results have implications for our understanding of oxidation processes on reducible rare-earth oxides., Materials based on ceria (Ce[O.sub.2]) are used in the production and purification of hydrogen, the purification of exhaust gases in three-way automotive catalytic converters, and other catalytic applications (1-4). In [...]

Published
2005

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