Impact of Cerium Oxide on the State and Hydrogenation Activity of Ruthenium Species Incorporated on Mesocellular Foam Silica

Herein, the impact of cerium species loaded on mesoporous silica of MCF type on the state and catalytic activity of ruthenium species was studied. Up to 20 wt.% of cerium was incorporated on the silica surface, whereas the same 1 wt.% of Ru loading was applied. The samples prepared were examined by low temperature N-2 adsorption/desorption, XRD, XRF, ICP-OES, XPS and H-2 chemisorption. The catalytic activity of the materials obtained was investigated in the transformation of levulinic acid to gamma-valerolactone. It was documented that the presence of Ce favored an increase in the dispersion of ruthenium species, which had a positive impact on the hydrogenation activity for up to 10 wt.% of Ce. Nevertheless, the highest cerium loading had a negative influence on the textural parameters of the support.

Automated summary

The study revealed that cerium species loaded on mesoporous silica of MCF type can promote the dispersion of ruthenium species, leading to enhanced hydrogenation activity. However, excessive cerium loading had a negative impact on the textural parameters of the support.