Journal
CHEMCATCHEM
Volume 7, Issue 18, Pages 2853-2863Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201500352
Keywords
biomass; nanotubes; heterogeneous catalysis; oxidation; supported catalysts
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Funding
- National Natural Science Foundation of China [21173172, 21473141, 21373170]
- Research Fund for the Doctoral Program of High Education [2013012113001]
- Program for Changjiang Scholars and Innovative Research Team in Chinese Universities [IRT 14R31]
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The aerobic oxidation of 5-hydroxymethylfurfural (HMF) into 2,5-furandicarboxylic acid (FDCA) is one of the most attractive reactions to establish biomass-based sustainable chemical processes. Supported Au and Pt catalysts have mainly been reported for this reaction, but excess amounts of base additives are generally required, which makes the process less green. Here, we demonstrate that Pt nanoparticles loaded on functionalized carbon nanotubes (CNTs) can catalyze the aerobic oxidation of HMF to FDCA in water without any base additives. Kinetic studies suggest a tandem reaction mechanism via 2,5-diformylfuran and 5-formylfurancarboxylic acid intermediates. It has been clarified that the oxygen-containing functional groups, in particular carbonyl/quinone and/or phenol groups, on CNT surfaces play crucial roles in FDCA formation. These functional groups could enhance the adsorption of HMF as well as the reaction intermediates from water and might facilitate hydrogen transfer.
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