title: Selective aerobic oxidation of HMF to 2,5-diformylfuran on covalent triazine frameworks-supported Ru catalysts.
abstract: The selective aerobic oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran has been performed under mild conditions at 80 °C and 20 bar of synthetic air in methyl t-butyl ether. Ru clusters supported on covalent triazine frameworks (CTFs) allowed excellent selectivity and superior catalytic activity compared to other support materials such as activated carbon, γ-Al2 O3 , hydrotalcite, or MgO. CTFs with varying pore size, specific surface area, and N content could be prepared from different monomers. The structural properties of the CTF materials influence the catalytic activity of Ru/CTF significantly in the aerobic oxidation of HMF, which emphasizes the superior activity of mesoporous CTFs. Recycling of the catalysts is challenging, but promising methods to maintain high catalytic activity were developed that facilitate only minor deactivation in five consecutive recycling experiments.
authors.affiliation: Chair of Heterogeneous Catalysis & Chemical Technology, Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 1, 52074 Aachen (Germany).
authors.forename: Jens
authors.initials: J
authors.lastname: Artz
authors.forename: Sabrina
authors.initials: S
authors.lastname: Mallmann
authors.forename: Regina
authors.initials: R
authors.lastname: Palkovits
mesh_terms: D002384:Catalysis; D005662:Furaldehyde / Q000031:analogs & derivatives* / Q000737:chemistry; D005663:Furans / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry; D010084:Oxidation-Reduction; D012428:Ruthenium / Q000737:chemistry*; D014227:Triazines / Q000737:chemistry*
chemical_list: D005663:Furans; D014227:Triazines; C008046:5-hydroxymethylfurfural; D012428:Ruthenium; D005662:Furaldehyde; C476922:2,5-diformylfuran
keywords: biomass; heterogeneous catalysis; oxidation; ruthenium; supported catalysts