Abstract: 2,5-Furandicarboxylic acid (FDCA) is a significant biomass-based platform compound, and its efficient synthesis holds great importance for the high-value utilization of biomass. In this study, 2,5-bis(hydroxymethyl)furan (BHMF), which exhibits superior stability compared to 5-hydroxymethylfurfural (HMF), was used as the feedstock. Employing Pt/amorphous carbon (Pt/a-C) nanomaterials as the catalyst, highly efficient electrocatalytic oxidation of BHMF to FDCA was achieved under mild conditions (1.45 V vs. RHE, room temperature and ambient pressure). Characterization results revealed that Pt was uniformly loaded onto the amorphous carbon support in the form of nanowires, forming a strong electron interaction interface via Pt–C bonds. Electrochemical tests demonstrated that the onset potential of Pt/a-C was negatively shifted by 218 mV compared to commercial Pt/C, with a Tafel slope of 34.63 mV?dec?1 and a significantly reduced charge transfer resistance. At a potential of 1.45 V, the FDCA yield reached 92.80% with a Faradaic efficiency of 91.45%, and the performance remained stable after five cycles. Mechanistic studies indicated that the reaction follows a pathway of "BHMF → aldol intermediate → FDCA," with the synergistic effect between the Pt active sites and the support promoting the reaction kinetics. This research provides a novel strategy for the green synthesis of biomass-based FDCA.

Key words: 5-Hydroxymethylfurfural, 2,5-Furandicarboxylic acid, Electrocatalytic oxidation, Pt/amorphous carbon, High-value utilization of biomass