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. VillaSecondo
;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.File | Dimensione | Formato | |
---|---|---|---|
VillaEtAlii_GoldIridium_Chinese_2016.pdf
accesso riservato
Tipologia:
Publisher's version/PDF
Dimensione
957.1 kB
Formato
Adobe PDF
|
957.1 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.