Journal
CHEMSUSCHEM
Volume 11, Issue 13, Pages 2083-2090Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201800448
Keywords
2; 5-furandicarboxylic acid; high-surface-area ZrO2; oxidation catalyst; ruthenium; surface casting
Funding
- Marietta Blau scholarship of the OeAD
- Austrian ministry of science, research and economics
- Excellence Initiative by the German federal government to promote science and research at German universities
- Excellence Initiative by the German state government to promote science and research at German universities
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Several ZrO2-supported ruthenium catalysts were prepared and utilized in the oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) under base-free conditions. Full conversion of HMF and almost perfect selectivity towards FDCA (97%) were achieved after 16h by using pure O-2 as an oxidant and water as a solvent. The catalytic tests show that the size of the Ru particles is crucial for the catalytic performance and that the utilization of high-surface-area ZrO2 leads to formation of very small Ru particles. Superior activity was obtained for catalysts based on ZrO2 that had been synthesized by a surface-casting method and has high surface areas up to 256m(2)g(-1). In addition to good activity and selectivity, these catalysts show also high stability and constant activity upon recycling, confirming the suitability of Ru/ZrO2 in the base-free oxidation of HMF.
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