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<p>Developing efficient and stable electrocatalysts is key to converting 5-hydroxymethylfurfural (HMF) into the value-added product 2,5-furandicarboxylic acid (FDCA). Herein, a three-dimensional porous nanosheet-structured nickel-molybdenum-copper (NiMoCu) ternary catalyst was constructed on nickel foam via a two-step electrodeposition strategy coupled with alkaline heat treatment. Characterization (XRD, Raman, TEM, XPS) revealed the homogeneous integration of Ni, Mo, and Cu species at the nanoscale, forming multiple heterointerfaces (MoO<sub>3</sub>–CuO/NiOOH). Meanwhile, Cu incorporation refined the MoO<sub>3</sub> crystallite size to 8.2&#xa0;nm and promoted the in situ formation of amorphous NiOOH containing Ni³⁺ species. Furthermore, the interfacial electron transfer effect optimized charge transport pathways, thereby promoting an efficient HMFOR process. At 1.47&#xa0;V vs. RHE, this catalyst showed record HMF electrooxidation performance. The HMF conversion was 99%, FDCA selectivity was near 100%, FDCA yield was 98%, and Faradaic efficiency was 98%. After four cycles in a row, the yield dropped by less than 2%. The excellent performance of the NiMoCu catalyst comes from the synergy of its three metals. Ni³⁺ acts as the active center and drives the reaction. Mo<sup>6+</sup> keeps the Ni³⁺ state stable and speeds up charge movement. Cu stops the side oxygen evolution reaction (OER). The OER contribution is under 2%. This work offers a new way to design efficient and stable catalysts for the electrocatalytic conversion of HMF, a key biomass platform compound.</p> Graphical Abstract <p></p>

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Near-Quantitative Electrocatalytic Oxidation of HMF to FDCA Over a NiMoCu Heterostructured Catalyst

  • 期刊论文

  • 发表日期：

    2026年5月22日

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  • Dongyu Cao,
  • Haitao Gao,
  • Tianyi Wang,
  • Jinbo Chen

摘要

Developing efficient and stable electrocatalysts is key to converting 5-hydroxymethylfurfural (HMF) into the value-added product 2,5-furandicarboxylic acid (FDCA). Herein, a three-dimensional porous nanosheet-structured nickel-molybdenum-copper (NiMoCu) ternary catalyst was constructed on nickel foam via a two-step electrodeposition strategy coupled with alkaline heat treatment. Characterization (XRD, Raman, TEM, XPS) revealed the homogeneous integration of Ni, Mo, and Cu species at the nanoscale, forming multiple heterointerfaces (MoO3–CuO/NiOOH). Meanwhile, Cu incorporation refined the MoO3 crystallite size to 8.2 nm and promoted the in situ formation of amorphous NiOOH containing Ni³⁺ species. Furthermore, the interfacial electron transfer effect optimized charge transport pathways, thereby promoting an efficient HMFOR process. At 1.47 V vs. RHE, this catalyst showed record HMF electrooxidation performance. The HMF conversion was 99%, FDCA selectivity was near 100%, FDCA yield was 98%, and Faradaic efficiency was 98%. After four cycles in a row, the yield dropped by less than 2%. The excellent performance of the NiMoCu catalyst comes from the synergy of its three metals. Ni³⁺ acts as the active center and drives the reaction. Mo6+ keeps the Ni³⁺ state stable and speeds up charge movement. Cu stops the side oxygen evolution reaction (OER). The OER contribution is under 2%. This work offers a new way to design efficient and stable catalysts for the electrocatalytic conversion of HMF, a key biomass platform compound.

Graphical Abstract