Au-Ir and Au-Ru on TiO2 catalysts prepared by sequential deposition-precipitation technique were compared with the corresponding monometallics in the hydrogenation of levulinic acid to γ-valerolactone. Interestingly the addition of Au to Ir/TiO2 showed a detrimental effect on the activity of Ir monometallic catalyst whereas a positive synergistic effect was shown in the case of Ru. Both catalysts were reduced under H2 to increase the M0-Au0 interaction. From previous DFT calculations and catalytic test, we addressed the lower activity of Au-Ir/TiO2 than that of Ir/TiO2 to the interference of Au into the redox mechanism of Ir atoms.

Gold-iridium catalysts for the hydrogenation of biomass derived products / L. Landenna, A. Villa, R. Zanella, C. Evangelisti, L. Prati. - In: CHINESE JOURNAL OF CATALYSIS. - ISSN 1872-2067. - 37:10(2016 Oct), pp. 1771-1775.

Gold-iridium catalysts for the hydrogenation of biomass derived products

A. Villa
Secondo
;
L. Prati
2016

Abstract

Au-Ir and Au-Ru on TiO2 catalysts prepared by sequential deposition-precipitation technique were compared with the corresponding monometallics in the hydrogenation of levulinic acid to γ-valerolactone. Interestingly the addition of Au to Ir/TiO2 showed a detrimental effect on the activity of Ir monometallic catalyst whereas a positive synergistic effect was shown in the case of Ru. Both catalysts were reduced under H2 to increase the M0-Au0 interaction. From previous DFT calculations and catalytic test, we addressed the lower activity of Au-Ir/TiO2 than that of Ir/TiO2 to the interference of Au into the redox mechanism of Ir atoms.
Gold-irdium catalyst; Gold-ruthenium catalyst; Levulinic acid hydrogenation; Synergistic effect; γ-Valerolactone; Catalysis; Chemistry (all)
Settore CHIM/03 - Chimica Generale e Inorganica
Settore CHIM/04 - Chimica Industriale
ott-2016
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/505336
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