Chinese Journal of Catalysis ›› 2024, Vol. 67: 144-156.DOI: 10.1016/S1872-2067(24)60151-8

• Article • Previous Articles     Next Articles

Dual-metal synergy unlocking ROS-free catalysis for rapid aerobic oxidation of 5-hydroxymethylfurfural at room temperature

Meiyun Zhanga,b, Penghua Chea, Hong Maa(), Xin Liua, Shujing Zhanga, Yang Luoa, Jie Xua()   

  1. aState Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
    bUniversity of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2024-08-02 Accepted:2024-09-20 Online:2024-11-30 Published:2024-11-30
  • Contact: Hong Ma, Jie Xu
  • Supported by:
    National Key R&D Program of China(2022YFA1504902);National Natural Science Foundation of China(22272172);National Natural Science Foundation of China(22072149);National Natural Science Foundation of China(21790331)

Abstract:

Clean catalytic oxidation has a broad prospect in the modern chemical engineering and energy chemistry fields. However, unexpected over-oxidation and disruptive degradation are frequently induced by excessive reactive oxygen species (ROS). Herein, we reported a new ROS-free approach to effectively drive O2 to be activated into highly reactive surface peroxo species through enzyme-mimicking mechanism. Benefiting from the dual-metal synergy effect between Cu and Co active sites, ROS (H2O2 and OH) is generated in situ while further scavenged completely into surface peroxo species, which gives rise to very high selectivity and extremely high carbon balance. For example, the CuCo/N-C catalyst affords >99.8% conversion and 94.5% selectivity to 2,5-furanedicarboxylic acid at 25 °C for 6 h in the aerobic oxidation of biomass platform 5-hydroxymethylfurfural. Moreover, it achieved exceptional performance in the oxidation of a variety of hydroxyl compounds to organic acids with high yields (89.9%-99.5%) at a mild temperature (25-40 °C). This exploration introduces an innovative clue for emulating enzyme catalysts, thereby enriching our comprehension and advancement of biologically inspired catalytic oxidations.

Key words: Biomass, Dual metal synergy, Molecular oxygen activation, 5-Hydroxymethylfurfural, Reactive oxygen species free, Selective oxidation