Journal
CHINESE JOURNAL OF CATALYSIS
Volume 37, Issue 10, Pages 1771-1775Publisher
SCIENCE PRESS
DOI: 10.1016/S1872-2067(16)62512-3
Keywords
Levulinic acid hydrogenation; Gold-irdium catalyst; Gold-ruthenium catalyst; gamma-Valerolactone; Synergistic effect
Funding
- [UNAM-PAPIIT IN105416]
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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 y-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 H-2 to increase the M-0-Au-0 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. (C) 2016, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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