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<p>The selective reductive amination of biomass-derived furfural to valuable furfurylamine, using ammonia and H<sub>2</sub> as the nitrogen and hydrogen sources, represents a green and sustainable synthesis route. However, it faces challenges of insufficient catalytic selectivity. In this study, a Ni-Mo bimetallic catalyst (Ni<sub>3</sub>-Mo/Al<sub>2</sub>O<sub>3</sub>) supported on <i>γ</i>-Al<sub>2</sub>O<sub>3</sub> carrier was successfully fabricated via a sol-gel method for the reductive amination of furfural to furfurylamine. Comprehensive characterizations (XRD, XPS, H<sub>2</sub>-TPR, NH<sub>3</sub>-TPD, etc.) revealed that the introduction of Mo induces strong electronic interactions with Ni, facilitating the reduction of Ni species, increasing the surface concentration of metallic Ni<sup>0</sup>, and significantly enhancing the catalyst’s acidity. Under optimized reaction conditions (90&#xa0;°C, 2 MPa H<sub>2</sub>, 2&#xa0;h in ammonia methanol solution), the Ni<sub>3</sub>-Mo/Al<sub>2</sub>O<sub>3</sub> catalyst achieved a furfural conversion of &gt; 99% and a high furfurylamine yield of 92.0%. This performance surpasses that of its monometallic counterparts (Ni/Al<sub>2</sub>O<sub>3</sub> and Mo/Al<sub>2</sub>O<sub>3</sub>) and a physically mixed sample, and is comparable to many reported precious-metal catalysts. The reaction pathway study identified the Schiff base as the key intermediate. Furthermore, the catalyst demonstrated good stability and recyclability over five cycles. This work provides a cost-effective and efficient non-precious metal catalyst candidate for the sustainable production of bio-based amines.</p> Graphical Abstract <p></p>

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Mo-Promoted Ni/Al2O3 Bimetallic Catalyst for Efficient Reductive Amination of Furfural to Furfurylamine

  • 期刊论文

  • 发表日期：

    2026年6月15日

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  • Junyi Liang,
  • Weitao Wang,
  • Huan Wang,
  • Jiaqi Zhu,
  • Zhiyuan Ren,
  • Zhenhong He,
  • Zhaotie Liu

摘要

The selective reductive amination of biomass-derived furfural to valuable furfurylamine, using ammonia and H2 as the nitrogen and hydrogen sources, represents a green and sustainable synthesis route. However, it faces challenges of insufficient catalytic selectivity. In this study, a Ni-Mo bimetallic catalyst (Ni3-Mo/Al2O3) supported on γ-Al2O3 carrier was successfully fabricated via a sol-gel method for the reductive amination of furfural to furfurylamine. Comprehensive characterizations (XRD, XPS, H2-TPR, NH3-TPD, etc.) revealed that the introduction of Mo induces strong electronic interactions with Ni, facilitating the reduction of Ni species, increasing the surface concentration of metallic Ni0, and significantly enhancing the catalyst’s acidity. Under optimized reaction conditions (90 °C, 2 MPa H2, 2 h in ammonia methanol solution), the Ni3-Mo/Al2O3 catalyst achieved a furfural conversion of > 99% and a high furfurylamine yield of 92.0%. This performance surpasses that of its monometallic counterparts (Ni/Al2O3 and Mo/Al2O3) and a physically mixed sample, and is comparable to many reported precious-metal catalysts. The reaction pathway study identified the Schiff base as the key intermediate. Furthermore, the catalyst demonstrated good stability and recyclability over five cycles. This work provides a cost-effective and efficient non-precious metal catalyst candidate for the sustainable production of bio-based amines.

Graphical Abstract