Abstract
The electrochemical oxidation of 5-hydroxymethylfurfural (HMF) is the most promising method for the production of the high-value-added product 2,5-furan dicarboxylic acid (FDCA), in which the electronic and surface structures of the electrocatalysts are the main factors affecting the charge transfer efficiency and catalytic activity. In this work, Mn3O4-Fe2P/NF with p-n heterojunction structure was fabricated by hydrothermal and low-temperature phosphorization. The close contact between the p-n junctions induced the electron flow from the n-type Fe2P to the p-type Mn3O4, establishing more enhanced and more effective positively-charged active centers on the surface of Fe2P, which is conducive to the oxidation of HMF under alkaline conditions and the adsorption of electrons generated by OH-. The synergistic effect between the p-n heterojunction promotes the oxidation of HMF, resulting in a Faraday efficiency of 99.64%, as well as a current density of 100mAcm-2, 100% HMF conversion, and 99.60% FDCA yield (1.48V vs. RHE). This work provides practical experience and design strategies for non-precious metal heterojunction catalysts for biomass-based production of high-value-added products.
Published Version
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