Gold-iridium catalysts for the hydrogenation of biomass derived products

doi:10.1016/S1872-2067(16)62512-3

Abstract

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.

Key words: Levulinic acid hydrogenation, Gold-irdium catalyst, Gold-ruthenium catalyst, γ-Valerolactone, Synergistic effect

Lorenzo Landenna, Alberto Villa, Rodolfo Zanella, Claudio Evangelisti, Laura Prati. Gold-iridium catalysts for the hydrogenation of biomass derived products[J]. Chinese Journal of Catalysis, 2016, 37(10): 1771-1775.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(16)62512-3

https://www.cjcatal.com/EN/Y2016/V37/I10/1771

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