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<p>Nickel-promoted molybdenum carbide (Mo<sub>2</sub>C) catalysts supported on γ-Al<sub>2</sub>O<sub>3</sub> were synthesized via incipient wetness impregnation and evaluated for dry methane reforming (DMR). Comprehensive physicochemical characterizations including XRD, SEM-EDS, H<sub>2</sub>-TPR, XPS, TPSR, and TG-DSC were conducted to elucidate structure-performance relationships. Non-promoted Mo<sub>2</sub>C exhibited poor catalytic stability due to oxidation during DMR. The incorporation of nickel significantly enhanced catalytic activity and stability by promoting the in-situ re-carburization of oxidized Mo species and facilitating methane activation. The optimized Ni/Mo molar ratio of 1:1 led to the formation of a stable Ni-Mo synergistic phase, which exhibited superior resistance to sintering and deactivation.</p>

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Dry Methane Reforming over Alumina Supported Molybdenum Carbide Catalysts Promoted with Nickel

  • 期刊论文

  • 发表日期：

    2025年8月31日

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  • Tong Li,
  • Leila Dehimi,
  • Andrei Khodakov,
  • Pascal Granger,
  • Mirella Virginie

摘要

Nickel-promoted molybdenum carbide (Mo2C) catalysts supported on γ-Al2O3 were synthesized via incipient wetness impregnation and evaluated for dry methane reforming (DMR). Comprehensive physicochemical characterizations including XRD, SEM-EDS, H2-TPR, XPS, TPSR, and TG-DSC were conducted to elucidate structure-performance relationships. Non-promoted Mo2C exhibited poor catalytic stability due to oxidation during DMR. The incorporation of nickel significantly enhanced catalytic activity and stability by promoting the in-situ re-carburization of oxidized Mo species and facilitating methane activation. The optimized Ni/Mo molar ratio of 1:1 led to the formation of a stable Ni-Mo synergistic phase, which exhibited superior resistance to sintering and deactivation.