Chinese Journal of Catalysis ›› 2026, Vol. 90: 309-332.DOI: 10.1016/S1872-2067(26)65215-1

• Articles • Previous Articles    

Mechanism insights into the synergistic catalysis of bimetallic RuCo alloys for the highly selective reductive amination of biomass-derived furfural

Jun Wua,*(), Jiahao Baia, Gang Pana, Tailong Shia, Yongjie Xib,*(), Fuwei Lic,d,*(), Yong Lia,*()   

  1. a Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, School of Materials Science & Engineering, Shaanxi University of Science & Technology, Xi’an 710021, Shaanxi, China
    b State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China
    c School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
    d State Key Laboratory of Mesoscience and Process Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2026-02-24 Accepted:2026-04-28 Online:2026-11-18 Published:2026-11-19
  • About author:First author contact:

    Jun Wu: writing-original draft, writing-review and editing, methodology, conceptualization, resources, funding acquisition, investigation, supervision, visualization, project administration. Jiahao Bai: writing-original draft, data curation, methodology, investigation, validation, formal analysis. Gang Pan: writing-original draft, data curation, methodology, investigation, validation, formal analysis. Tailong Shi: validation, formal analysis. Yongjie Xi: methodology, software, investigation, visualization. Fuwei Li: writing-review and editing, methodology, visualization. Yong Li: writing-review and editing, project administration, supervision.

  • Supported by:
    National Natural Science Foundation of China(21902094);National Natural Science Foundation of China(22472177);China Postdoctoral Science Foundation(2020M683405);Young Talent Fund of Association for Science and Technology in Shaanxi, China(20260604);Natural Science Foundation of Shaanxi Province(2023-JC-QN-0103);Natural Science Foundation of Shaanxi Province(2026JC-YBMS-0138);Open Fund of State Key Laboratory of Mesoscience and Process Engineering(MESO-25-D16)

Abstract:

The highly selective synthesis of valuable primary amines through the reductive amination of renewable biomass-derived carbonyl compounds under mild conditions remains a significant challenge. Herein, we developed a series of bimetallic nanocatalysts featuring RuCo alloys embedded within N-doped hollow carbon spheres (Ru2Co1@NHCS-T, T: 600-800) via the hard template-directed in situ synthesis routes. Through RuCo alloying effects and metal-support interaction, the electronic structure and geometric configuration of bimetallic RuCo catalysts were targetedly modulated and constructed the bifunctional active sites consisted of electron-rich Ru0 and electron-deficient Coδ+ within RuCo alloys, achieving the simultaneously improved catalytic activity, primary amine selectivity and stability for biomass-derived furfural reductive amination. The optimized Ru2Co1@NHCS-600 catalyst presented a 98.1% furfurylamine yield and a high initial reaction rate of 238.65 molFUA molSm-1 h-1 under mild conditions of 0.1 MPa hydrogen, markedly outperforming monometallic Ru@NHCS-600 and most previously reported catalysts. The synergistic catalysis of RuCo alloys contributed to the superior catalytic performance of Ru2Co1@NHCS-600 for furfural reductive amination based on systematic structure characterizations and intrinsic kinetic evaluations. Notably, the electron-rich Ru0 active sites significantly enhanced the adsorption and dissociation activation of H2, while the electron-deficient Coδ+ sites synergistically promoted the adsorption and activation of furfural, NH3 and Schiff base intermediate during the tandem reductive amination. Combined with density functional theory calculations, the catalytic advantages of bimetallic RuCo compared with monometallic counterparts and the ammonolysis reaction mechanism for the key Schiff base intermediate were clarified. The proposed synergistic catalysis strategy of bimetallic RuCo catalysts provided important guidance for rational design of high-performance catalysts for sustainable synthesis of valuable nitrogen-containing compounds via biomass conversion.

Key words: Synergistic catalysis, Bimetallic catalyst, Reductive amination, Furfural, Primary amine