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<p>Magnesium silicate (MS) has emerged as an ideal candidate material for catalyst support due to its abundant silanol groups on the surface. In this study, spherical network MS supports, composed of layered talc-type MS nanosheets, were successfully synthesized using SiO<sub>2</sub> microspheres as the templates through a hydrothermally-assisted sacrificial-template method. Subsequently, Cu-based MS catalysts for 1,4-Butynediol (BYD) production were prepared. XRD, BET, SEM, EDS, TEM, SAED, XPS, CO<sub>2</sub>-TPD, and H<sub>2</sub>-TPR analyses revealed that the Mg/Si ratio plays a critical role in regulating the surface and electronic structure of the MS supports. When the Mg/Si ratio was 0.75 and the Cu loading was 25 wt%, the catalyst exhibited the highest specific surface area and basic-site density, achieving optimal formaldehyde conversion of 86.82%, BYD selectivity of 79.14%, and BYD yield of 68.71%. This study provides valuable insights for designing high-performance BYD catalysts.</p>

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Effect of Mg/Si ratio on the structure and properties of Cu-based magnesium silicate catalyst for 1,4-butynediol production

  • 期刊论文

  • 发表日期：

    2026年5月10日

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  • Tongqi Liu,
  • Yue Shen,
  • Yuanyuan Zhang,
  • Feng Gu,
  • Linjun Wang,
  • Tianshi Shi

摘要

Magnesium silicate (MS) has emerged as an ideal candidate material for catalyst support due to its abundant silanol groups on the surface. In this study, spherical network MS supports, composed of layered talc-type MS nanosheets, were successfully synthesized using SiO2 microspheres as the templates through a hydrothermally-assisted sacrificial-template method. Subsequently, Cu-based MS catalysts for 1,4-Butynediol (BYD) production were prepared. XRD, BET, SEM, EDS, TEM, SAED, XPS, CO2-TPD, and H2-TPR analyses revealed that the Mg/Si ratio plays a critical role in regulating the surface and electronic structure of the MS supports. When the Mg/Si ratio was 0.75 and the Cu loading was 25 wt%, the catalyst exhibited the highest specific surface area and basic-site density, achieving optimal formaldehyde conversion of 86.82%, BYD selectivity of 79.14%, and BYD yield of 68.71%. This study provides valuable insights for designing high-performance BYD catalysts.