Improved (Photo)catalytic Propene Hydration in a Gas/Solid System by Using Heteropolyacid/Oxide Composites: Electron Paramagnetic Resonance, Acidity, and Role of Water | Zendy

GarcíaLópez Elisa I. | Zendy; Marcì Giuseppe | Zendy; Pomilla Francesca R. | Zendy; Liotta Leonarda F. | Zendy; Megna Bartolomeo | Zendy; Paganini Maria C. | Zendy; Gionco Chiara | Zendy; Giamello Elio | Zendy; Palmisano Leonardo | Zendy

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Improved (Photo)catalytic Propene Hydration in a Gas/Solid System by Using Heteropolyacid/Oxide Composites: Electron Paramagnetic Resonance, Acidity, and Role of Water

Author(s) -

GarcíaLópez Elisa I.,

Marcì Giuseppe,

Pomilla Francesca R.,

Liotta Leonarda F.,

Megna Bartolomeo,

Paganini Maria C.,

Gionco Chiara,

Giamello Elio,

Palmisano Leonardo

Publication year - 2017

Publication title -

european journal of inorganic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.667

H-Index - 136

eISSN - 1099-0682

pISSN - 1434-1948

DOI - 10.1002/ejic.201601396

Subject(s) - electron paramagnetic resonance , chemistry , propene , catalysis , reactivity (psychology) , oxide , spectroscopy , inorganic chemistry , paramagnetism , heterogeneous catalysis , thermal treatment , photochemistry , nuclear magnetic resonance , organic chemistry , composite material , materials science , medicine , physics , alternative medicine , pathology , quantum mechanics

Binary materials composed of the oxides SiO 2 , TiO 2 and N‐doped TiO 2 and the Keggin heteropolyacid (PW 12 ) were prepared and physicochemically characterized. They were used as catalysts and photocatalysts for the hydration of propene to 2‐propanol. The characterization of the samples, particularly the electron paramagnetic resonance (EPR) spectroscopy results and the acidity properties, were useful to explain the key role played by the PW 12 in the composite materials in the thermal and photoassisted catalytic processes. The simultaneous presence of heat and UV light improved the activity of PW 12 in the thermal process, and the binary materials showed better (photo)catalytic activities than that of the bare PW 12 in almost all cases. For the first time, this work evidenced through EPR spectroscopy that the increase of reactivity under irradiation could be attributed to the ability of photoexcited PW 12 to trap electrons, particularly if the PW 12 is supported. Moreover, the effect of water on the reactivity was also studied.

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