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<p>Aqueous-phase reforming of methanol is a significant approach for hydrogen generation. However, the development of efficient catalysts remains a critical challenge. In this study, a series of nickel-based catalysts supported on molybdenum carbide were synthesized, with the composition ratio of α-MoC and β-Mo<sub>2</sub>C precisely regulated by varying the ammonization duration. The structure of synthesized catalysts and their catalytic performance were investigated by XRD, H<sub>2</sub>-TPD, TEM-EDX, XPS, and rate measurements. The highest hydrogen production rate (33.11 mmol<sub>H2</sub>/g<sub>cat</sub>/h) was achieved over Ni/Mo<sub>x</sub>C-3 catalyst (with 72.3% α-MoC), which is 2.45-fold higher than Ni/α-MoC and 1.58-fold higher than Ni/β-Mo<sub>2</sub>C, respectively. This is attributed to the synergistic effect between α-MoC and β-Mo<sub>2</sub>C for the hydrogen production from aqueous-phase methanol/water reforming. These findings offer valuable guidance for the rational design of advanced catalysts for the aqueous-phase reforming of methanol.</p> Graphical Abstract <p></p>

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Dual-Phase Engineering of α-MoC/β-Mo2C Heterostructures in Ni-Modified Molybdenum Carbide Catalysts: Synergistic Mechanisms and Enhanced Hydrogen Production from Aqueous-Phase Methanol/Water Reforming

  • 期刊论文

  • 发表日期：

    2025年6月11日

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  • Yiqing Zhang,
  • Yangbin Ren,
  • Yunlong Bo,
  • Pengchao Ren,
  • Qi Sun,
  • Yujing Weng,
  • Yulong Zhang

摘要

Aqueous-phase reforming of methanol is a significant approach for hydrogen generation. However, the development of efficient catalysts remains a critical challenge. In this study, a series of nickel-based catalysts supported on molybdenum carbide were synthesized, with the composition ratio of α-MoC and β-Mo2C precisely regulated by varying the ammonization duration. The structure of synthesized catalysts and their catalytic performance were investigated by XRD, H2-TPD, TEM-EDX, XPS, and rate measurements. The highest hydrogen production rate (33.11 mmolH2/gcat/h) was achieved over Ni/MoxC-3 catalyst (with 72.3% α-MoC), which is 2.45-fold higher than Ni/α-MoC and 1.58-fold higher than Ni/β-Mo2C, respectively. This is attributed to the synergistic effect between α-MoC and β-Mo2C for the hydrogen production from aqueous-phase methanol/water reforming. These findings offer valuable guidance for the rational design of advanced catalysts for the aqueous-phase reforming of methanol.

Graphical Abstract