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Selective Aerobic Oxidation of 5‐HMF into 2,5‐Furandicarboxylic Acid with Pt Catalysts Supported on TiO2‐ and ZrO2‐Based Supports

Open access
Ait Rass, Hicham, Essayem, Nadine, Besson, Michèle·2015·ChemSusChem

Abstract

Pt catalysts prepared over different metallic oxide supports were investigated in the oxidation of 5‐hydroxymethylfurfural (HMF) to 2,5‐furandicarboxylic acid (FDCA) in alkaline aqueous solutions with air, to examine the combined effect of the support and base addition. The base (nature and amount) played a significant role in the degradation or oxidation of HMF. Increasing amounts of the weak NaHCO 3 base improved significantly the overall catalytic activity of Pt/TiO 2 and Pt/ZrO 2 by accelerating the oxidation steps, especially for the aldehyde group. This was highlighted by a proposed kinetic model that gave very good concentration–time fittings. Moreover, the promotion of the catalyst with bismuth yielded a PtBi/TiO 2 catalytic system with improved activity and stability. Y 2 O 3 and La 2 O 3ZrO 2‐supported catalysts exhibited lower activity than Pt/ZrO 2, which suggests no cooperative effect of the weakly basic properties introduced and the homogeneous base. Quantitative oxidation of HMF (0.1 M) and high yields of FDCA (>99 %) were obtained in less than 5 h by using an HMF/Pt molar ratio of 100 and Na 2 CO 3 as a weak base over PtBi/TiO 2 (Bi/Pt=0.22).

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Metadata

Authors
Ait Rass, H., Essayem, N., & Besson, M.
Venue
ChemSusChem
Publisher
Wiley
Published
2015-03-03
Volume
8
Issue
7
Pages
1206-1217
ISSN
  • 1864-5631 (ISSN-L)
  • 1864-564X
OpenAlex
W2010781899
Cited by
247
References
5
FWCI
12.90
Type
journal article
Language
en
Open access
bronze

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