Journal
JOURNAL OF ENERGY CHEMISTRY
Volume 50, Issue -, Pages 96-105Publisher
ELSEVIER
DOI: 10.1016/j.jechem.2020.03.003
Keywords
Graphene oxide; Encapsulated nanoparticles; 5-hydroxymethylfurfual; 2,5-furandicarboxylic acid; Oxidation; Noble-metal free
Funding
- National Natural Science Foundation of China (NNSFC) [21805145, U1610108]
- Department of Science and Technology of Shandong Province [ZR2019BB068]
- Department of Science and Technology of Shanxi Province [201705D211001]
- Scientific and Technological Innovation Programs of High Education Institutions in Shanxi [201802001-1]
- Department of Human Resource and Social Security of Shanxi Province [Y6SW9613B1]
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Selective oxidation of 5-hydroxymethylfurfual (HMF) to 2,5-furandicarboxylic acid (FDCA) as a bioplastics monomer is efficiently promoted by a simple system without noble-metal and base additives. In this work, graphene oxide (GO) was first synthesised by an electrochemical method with flexible graphite paper (FGP) as start carbon material, then, nitrogen-doped graphene (NG) layers encapsulated Cu nanoparticles (NPs) was prepared by one-step thermal treatment of GO supported Cu2+ in flowing NH3 atmosphere. Compared with NG supported Cu NPs prepared by the traditional impregnation method, enhanced catalytic activity was achieved over Cu/NG and an FDCA yield of 95.2% was achieved under mild reaction conditions with tert-butylhydroperoxide (t-BuOOH) as the oxidant. Control experiments with different catalysts and different addition procedure of t-BuOOH showed the yield of HMF and various intermediates during reaction. From the changing of intermediates concentrations and reaction rates, a reaction pathway through HMF-DFF-FFCA-FDCA was proposed. This work gives a more convenient, more green, more economical and effective method in encapsulated metal NPs preparation and high selectivity in HMF oxidation to FDCA under mild conditions. (c) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
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