The development of sustainable, cost-effective catalytic systems for the electrochemical oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) is pivotal for advancing biomass-based economies and valorizing bio-based platform chemicals. Against the backdrop of intensifying focus on biomass resource recycling, the conversion of lignocellulosic agricultural residues, represented by waste fruit shells, into high-performance catalysts has emerged as a promising strategy, yet existing technologies are hampered by cumbersome processes, excessive energy consumption, and suboptimal catalytic efficiency, limiting scalable industrial application. Herein, we reported the fabrication of high-performance metal-free electrocatalysts using abundant waste fruit shells as the sole precursor, which were specifically designed for the electrochemical selective oxidation of HMF to FDCA. The as-prepared waste fruit shell-derived porous carbon catalyst exhibited exceptional catalytic performance: it achieved a FDCA yield of 96.48% and a Faraday efficiency (FE) of 93.01%, along with robust stability over multiple consecutive reaction cycles, demonstrating its potential for long-term practical application. This work couples agricultural waste upcycling with efficient FDCA synthesis, offering a low-cost green solution and advancing biomass-based circular economy.
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