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Ruthenium Supported on High‐Surface‐Area Zirconia as an Efficient Catalyst for the Base‐Free Oxidation of 5‐Hydroxymethylfurfural to 2,5‐Furandicarboxylic Acid
Author(s) -
Pichler Christian M.,
AlShaal Mohammad G.,
Gu Dong,
Joshi Hrishikesh,
Ciptonugroho Wirawan,
Schüth Ferdi
Publication year - 2018
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201800448
Subject(s) - catalysis , ruthenium , cubic zirconia , 5 hydroxymethylfurfural , base (topology) , chemistry , heterogeneous catalysis , chemical engineering , combinatorial chemistry , organic chemistry , materials science , mathematical analysis , ceramic , mathematics , engineering
Several ZrO 2 ‐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 16 h 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 ZrO 2 leads to formation of very small Ru particles. Superior activity was obtained for catalysts based on ZrO 2 that had been synthesized by a surface‐casting method and has high surface areas up to 256 m 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/ZrO 2 in the base‐free oxidation of HMF.