Oxidation of 5-hydroxymethylfurfural over supported Pt, Pd and Au catalysts

• Published in: Catalysis today Vol. 160; no. 1; pp. 55 - 60
• Main Authors: Davis, Sara E., Houk, Levi R., Tamargo, Erin C., Datye, Abhaya K., Davis, Robert J.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 02.02.2011
• Subjects: 5-Hydroxymethylfurfural; Biomass; catalysts; catalytic activity; Gold catalysis; Heterogeneous catalysis; hydroxymethylfurfural; Oxidation; Gold catalysis; Heterogeneous catalysis; Oxidation; Biomass; 5-Hydroxymethylfurfural
• ISSN: 0920-5861; 1873-4308
• DOI: 10.1016/j.cattod.2010.06.004

Supported Pt, Pd, and Au catalysts were evaluated in the aqueous-phase oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) at 295 K and high pH in a semibatch reactor. The intermediate reaction product 5-hydroxymethyl-2-furancarboxylic acid (HFCA) was formed in high yield over Au/C and Au/TiO 2 at 690 kPa O 2, 0.15 M HMF and 0.3 M NaOH, but did not continue to react substantially to FDCA at the specified O 2 pressure and base concentration. In contrast, the final reaction product FDCA was formed over Pt/C and Pd/C under identical conditions. The initial turnover frequency of HMF conversion was an order of magnitude greater on Au catalysts compared to either Pt or Pd. Increasing the O 2 pressure and NaOH concentration facilitated the conversion of HFCA to FDCA over the supported Au. The significant influence of base concentration on the product distribution indicates an important role of OH − in the activation, oxidation and degradation of HMF.