SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2025, Vol. 78 ›› Issue (2): 175-186.DOI: 10.1016/j.cjche.2024.10.015

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Gold nanoparticles on Fe-doped Co3O4 for enhanced low-temperature CO oxidation

Jianfang Liu, Hongwei Huang, Jie Yang, Laishuan Liu, Yu Li   

  1. Shanxi Province Key Laboratory of Chemical Process Intensification, School of Chemistry and Chemical Engineering, North University of China, Taiyuan 030051, China
  • Received:2024-07-11 Revised:2024-10-18 Accepted:2024-10-20 Online:2024-12-02 Published:2025-02-08
  • Supported by:
    This work was financially supported by the Fundamental Research Program of Shanxi Province of China (202203021211103, 202303021212172, 202403021211196).

Gold nanoparticles on Fe-doped Co3O4 for enhanced low-temperature CO oxidation

Jianfang Liu, Hongwei Huang, Jie Yang, Laishuan Liu, Yu Li   

  1. Shanxi Province Key Laboratory of Chemical Process Intensification, School of Chemistry and Chemical Engineering, North University of China, Taiyuan 030051, China
  • 通讯作者: Jianfang Liu,E-mail:20220037@nuc.edu.cn;Yu Li,E-mail:hgliyu@nuc.edu.cn
  • 基金资助:
    This work was financially supported by the Fundamental Research Program of Shanxi Province of China (202203021211103, 202303021212172, 202403021211196).

Abstract: A series of Au/CoxFe3-xO4 catalysts was synthesized using the sol-deposition method by depositing 2–5 nm Au particles on Fe-doped Co3O4. Co2FeO4, with a Co/Fe molar ratio of 2:1, exhibited higher specific surface area, Co3+/Co2+ ratio, and oxygen vacancy content compared to Co3O4. As a result, it displayed better performance in CO oxidation, achieving a total conversion temperature (T100) of 96 ℃. Au greatly improved the catalytic efficiency of all CoxFe3-xO4 samples, with the 0.2%Au/Co2FeO4 catalyst achieving a further decrease in T100 to 73 ℃. Stability tests conducted at room temperature on the 1%Au/CoxFe3-xO4 catalysts demonstrated a slowed deactivation rate after Fe-doping. The reaction pathway for CO oxidation catalyzed by Au/Co2FeO4 followed the Mars-van Krevelen mechanism.

Key words: Gold nanoparticles, Co3O4, Fe-doping, CO oxidation, Catalytic mechanisms

摘要: A series of Au/CoxFe3-xO4 catalysts was synthesized using the sol-deposition method by depositing 2–5 nm Au particles on Fe-doped Co3O4. Co2FeO4, with a Co/Fe molar ratio of 2:1, exhibited higher specific surface area, Co3+/Co2+ ratio, and oxygen vacancy content compared to Co3O4. As a result, it displayed better performance in CO oxidation, achieving a total conversion temperature (T100) of 96 ℃. Au greatly improved the catalytic efficiency of all CoxFe3-xO4 samples, with the 0.2%Au/Co2FeO4 catalyst achieving a further decrease in T100 to 73 ℃. Stability tests conducted at room temperature on the 1%Au/CoxFe3-xO4 catalysts demonstrated a slowed deactivation rate after Fe-doping. The reaction pathway for CO oxidation catalyzed by Au/Co2FeO4 followed the Mars-van Krevelen mechanism.

关键词: Gold nanoparticles, Co3O4, Fe-doping, CO oxidation, Catalytic mechanisms