title: Aerobic oxidation of hydroxymethylfurfural and furfural by using heterogeneous Cox Oy -N@C catalysts.
abstract: 2,5-Furandicarboxylic acid (FDCA) is considered to be a promising replacement for terephthalic acid since they share similar structures and properties. In contrast to FDCA, 2,5-furandicarboxylic acid methyl (FDCAM) has properties that allow it to be easily purified. In this work, we reported an oxidative esterification of 5-hydroxymethylfurfural (HMF) and furfural to prepare corresponding esters over Cox Oy -N@C catalysts using O2 as benign oxidant. High yield and selectivity of FDCAM and methyl 2-furoate were obtained under optimized conditions. Factors which influenced the product distribution were examined thoroughly. The Cox Oy -N@C catalysts were recycled five times and no significant loss of activity was detected. Characterization of the catalysts could explain such phenomena. Using XPS and TGA, we made a thorough investigation of the effects of ligand and pyrolysis temperature on catalyst activity.
authors.affiliation: Anhui Province Key laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei 230026 (PR China), Fax: (+86)-551-6360-6689.
authors.forename: Jin
authors.initials: J
authors.lastname: Deng
authors.forename: Hai-Jie
authors.initials: HJ
authors.lastname: Song
authors.forename: Min-Shu
authors.initials: MS
authors.lastname: Cui
authors.forename: Yi-Ping
authors.initials: YP
authors.lastname: Du
authors.forename: Yao
authors.initials: Y
authors.lastname: Fu
mesh_terms: D002244:Carbon / Q000737:chemistry; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D004951:Esterification; D005662:Furaldehyde / Q000031:analogs & derivatives* / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry
chemical_list: D003035:Cobalt; C008046:5-hydroxymethylfurfural; D002244:Carbon; D005662:Furaldehyde; D009584:Nitrogen; D010100:Oxygen
keywords: 2,5-furandicarboxylicacid dimethyl ester; 5-hydroxymethylfurfural; cobalt oxides; heterogeneous catalysis; oxidative esterification