Simultaneous production of value-added 2,5-furandicarboxylic acid (FDCA) and H₂ from the integrated 5-hydroxymethylfurfural (HMF) oxidation and hydrogen evolution reaction by electrocatalysis has drawn tremendous attention due to the significantly improved energy efficiency. However, HMF is not thermally and chemically stable enough to often cause heavy degradation, impeding its storage and industrialization. In this work, a more stable furan molecule, 2,5-bis(hydroxymethyl)furan (BHMF), was employed as the reaction substrate into the coupling system for the first time. By means of facile electrodeposition and subsequent oxidative activation, the standing CoOOH nanosheet electrocatalyst was fabricated to realize a complete BHMF conversion with 90.2 % FDCA yield and 100 % current efficiency for H₂ evolution. The reaction path and apparent activation energies were therefore discussed. Scalable properties and electrochemical durability of CoOOH were evaluated in a continuous flow reactor to harvest gram-level solid FDCA, highlighting the prospect of green coupling electrolysis for industrial application.

通过电催化的 5-羟甲基糠醛 (HMF) 氧化和析氢反应同时生产高附加值的 2,5-呋喃二甲酸 (FDCA) 和 H ₂已经引起了极大的关注，因为其显着提高了能源效率。然而，HMF 的热稳定性和化学稳定性不够，通常会导致严重降解，阻碍其储存和工业化。在这项工作中，更稳定的呋喃分子，2,5-双（羟甲基）呋喃（BHMF），首次被用作偶联系统的反应底物。通过简单的电沉积和随后的氧化活化，制备了站立的 CoOOH 纳米片电催化剂以实现完全的 BHMF 转化，FDCA 产率为 90.2%，H ₂电流效率为 100%进化。因此讨论了反应路径和表观活化能。在连续流动反应器中评估 CoOOH 的可扩展性和电化学耐久性，以收获克级固体 FDCA，突出了绿色耦合电解的工业应用前景。