CrOx decoration on Fe/TiO2 with tunable and stable oxygen vacancies for selective oxidation of glycerol to lactic acid

作者：Chu, Dawang; Zhou, Hui; Luo, Zhicheng^*

来源：New Journal of Chemistry, 2022, 46(39): 18744-18750.

DOI：10.1039/d2nj04088c

• ONE-POT CONVERSION
• CATALYTIC CONVERSION
• HYDROTHERMAL CONVERSION
• EFFICIENT
• NANOPARTICLES
• CELLULOSE
• HYDROGEN
• CARBON
• ATOM
• PD

Selective conversion of glycerol to lactic acid requires the synergistic activation of C-H, C-O, and O-H. Herein, we report an inexpensive Fe-Cr/TiO2 catalyst that achieves lactic acid formation with a high selectivity of 60.5%. By changing the Fe/Cr ratios and reduction temperatures, the structures of Vo and Vo-OH were altered, which determined the overall oxidation-dehydration-isomerization process. The in situ ATR-IR experiments confirmed the activation of glycerol by adsorbing the primary -OH, and a series of control experiments verified that Fe was responsible for the cleavage of C-H and O-H, while CrOx catalyzed the activation of C-O and C-H. This work designs a hydrothermal catalyst with multifunctional ability, which may guide the rational catalyst design for the selective oxidation of glycerol to lactic acid.

• 单位
  清华大学