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<p>Biomass conversion to building blocks powered by renewable electricity offers a promising route toward low-carbon plastics, as exemplified by the electrooxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA). However, this field is limited by a scalable electrocatalyst that can be operated at a large current. Here, we report a facile and scalable Cu-Co bimetal oxide (Cu-CoO<sub><i>x</i></sub>) electrocatalyst for efficient HMF oxidation. Comprehensive studies reveal that Cu promotes hydroxyl adsorption to form Co(OH)<sub>2</sub> and converts to CoO<sub><i>x</i></sub>(OH)<sub>y</sub> <i>via</i> electrooxidation. The Cu-CoO<sub><i>x</i></sub> catalyst was evaluated in a continuous-flow reactor with 200 cm<sup>2</sup> of electrode area, achieving high Faradaic efficiency (92.49%) and selectivity (ca. 89%) toward FDCA at large operation currents (40–200 A). Moreover, this reactor was operated at 100 A for more than 100 h, reaching high single-pass conversion efficiency (96.5%) and FDCA selectivity (95.5%). This work provides a foundation for the development of stable and large-area electrodes to enable scalable FDCA electrosynthesis.</p>

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Scalable Cu-CoOx Electrode for 5-Hydroxymethylfurfural Electrooxidation to 2,5-Furandicarboxylic Acid at >100 A

  • 期刊论文

  • 发表日期：

    2026年4月11日

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  • Yue Ren,
  • Yuhang Miao,
  • Qinghui Ren,
  • Shen Wang,
  • Liyi Zhang,
  • Ling Li,
  • Dengke Pan,
  • Hua Zhou,
  • Mingfei Shao

摘要

Biomass conversion to building blocks powered by renewable electricity offers a promising route toward low-carbon plastics, as exemplified by the electrooxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA). However, this field is limited by a scalable electrocatalyst that can be operated at a large current. Here, we report a facile and scalable Cu-Co bimetal oxide (Cu-CoOx) electrocatalyst for efficient HMF oxidation. Comprehensive studies reveal that Cu promotes hydroxyl adsorption to form Co(OH)2 and converts to CoOx(OH)y via electrooxidation. The Cu-CoOx catalyst was evaluated in a continuous-flow reactor with 200 cm2 of electrode area, achieving high Faradaic efficiency (92.49%) and selectivity (ca. 89%) toward FDCA at large operation currents (40–200 A). Moreover, this reactor was operated at 100 A for more than 100 h, reaching high single-pass conversion efficiency (96.5%) and FDCA selectivity (95.5%). This work provides a foundation for the development of stable and large-area electrodes to enable scalable FDCA electrosynthesis.