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<p>Achieving high selectivity in the electrocatalytic hydrogenation (ECH) of concentrated 5-hydroxymethylfurfural (HMF) to 2,5-dihydroxymethylfuran (DHMF) remains a challenge due to competitive adsorption at high HMF concentrations, which limits active-site availability and suppresses *H generation. Regulating the balance between *H generation and HMF adsorption is therefore essential for maintaining selectivity under practical conditions. Here we show a surface amide-functionalized copper nitride catalyst (Ami-Cu<sub>3</sub>N) featuring dual-nitrogen active sites. The catalyst achieves &gt;99% DHMF selectivity and &gt;98% Faradaic efficiency, with a production rate of 63.4 mmol cm<sup>-2</sup> h<sup>-1</sup> at 500 mA cm<sup>-2</sup> under concentrated HMF conditions. Mechanistic studies indicate that the combined roles of lattice nitrogen (promoting water dissociation) and amide nitrogen (modulating HMF adsorption) lower the energy barriers for both *H formation and HMF hydrogenation, facilitating high activity and selectivity. In addition, a coupled electrolysis system enables simultaneous production of value-added products at both electrodes. These findings provide design principles for electrocatalysts that enable selective biomass conversion at high reaction rates.</p>

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Amide-engineered copper nitride for shortcut-pathway-locked electroreduction of concentrated hydroxymethylfurfural

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月7日

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  • Ju Huang,
  • Jianqiu Zhu,
  • Bowen Liu,
  • Chencheng Dai,
  • Zhimin Chen,
  • Hao Wu,
  • Gang Li,
  • Shichao Du,
  • Jian-Qiang Wang,
  • Zhiyu Ren,
  • Zhichuan J. Xu,
  • Honggang Fu

摘要

Achieving high selectivity in the electrocatalytic hydrogenation (ECH) of concentrated 5-hydroxymethylfurfural (HMF) to 2,5-dihydroxymethylfuran (DHMF) remains a challenge due to competitive adsorption at high HMF concentrations, which limits active-site availability and suppresses *H generation. Regulating the balance between *H generation and HMF adsorption is therefore essential for maintaining selectivity under practical conditions. Here we show a surface amide-functionalized copper nitride catalyst (Ami-Cu3N) featuring dual-nitrogen active sites. The catalyst achieves >99% DHMF selectivity and >98% Faradaic efficiency, with a production rate of 63.4 mmol cm-2 h-1 at 500 mA cm-2 under concentrated HMF conditions. Mechanistic studies indicate that the combined roles of lattice nitrogen (promoting water dissociation) and amide nitrogen (modulating HMF adsorption) lower the energy barriers for both *H formation and HMF hydrogenation, facilitating high activity and selectivity. In addition, a coupled electrolysis system enables simultaneous production of value-added products at both electrodes. These findings provide design principles for electrocatalysts that enable selective biomass conversion at high reaction rates.