Scholarlink

<p>Cu/Al<sub>2</sub>O<sub>3</sub> composite catalysts have been widely researched within the category of Cu-based catalysts for CO<sub>2</sub> hydrogenation to synthesize methanol. However, issues such as low activity of copper during the catalytic process have been a significant concern. To address these issues, optimizing the interaction between Cu and Al<sub>2</sub>O<sub>3</sub> particles can be a viable solution. This paper presents four synthesis methods to prepare the catalyst, including hydrothermal technique, grinding-calcination technique, impregnation technique, and co-precipitation technique. Notably, the Cu/Al<sub>2</sub>O<sub>3</sub>-HT catalyst, prepared via the hydrothermal method, exhibits the highest specific surface area and strongest basic adsorption sites. Compared with catalysts produced by other methods, it features a flower-like microspherical structure and an increased surface area, providing more effective reactive active sites that can facilitate the adsorption and activation of carbon dioxide on the catalyst surface. Moreover, in situ infrared spectroscopy is conducted on the Cu/Al<sub>2</sub>O<sub>3</sub> catalyst prepared via hydrothermal method, revealing that the catalyst favors the synthesis of methanol through the formic acid pathway. This work presents a new approach to improving catalyst structure for CO<sub>2</sub> hydrogenation.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The effect of synthesis methods on the structure and catalytic performance of Cu/Al2O3 catalysts for CO2 hydrogenation to methanol

  • 期刊论文

  • 发表日期：

    2026年1月4日

查看全文
  • Xiaowei Chen,
  • Pengcheng Shen,
  • Yi Huang,
  • Chaozhi Tang,
  • Luyu Gao,
  • Zhenjie Sun,
  • Qichang Gao,
  • Qi Xu,
  • Jianwei Su,
  • Xinguo Xi

摘要

Cu/Al2O3 composite catalysts have been widely researched within the category of Cu-based catalysts for CO2 hydrogenation to synthesize methanol. However, issues such as low activity of copper during the catalytic process have been a significant concern. To address these issues, optimizing the interaction between Cu and Al2O3 particles can be a viable solution. This paper presents four synthesis methods to prepare the catalyst, including hydrothermal technique, grinding-calcination technique, impregnation technique, and co-precipitation technique. Notably, the Cu/Al2O3-HT catalyst, prepared via the hydrothermal method, exhibits the highest specific surface area and strongest basic adsorption sites. Compared with catalysts produced by other methods, it features a flower-like microspherical structure and an increased surface area, providing more effective reactive active sites that can facilitate the adsorption and activation of carbon dioxide on the catalyst surface. Moreover, in situ infrared spectroscopy is conducted on the Cu/Al2O3 catalyst prepared via hydrothermal method, revealing that the catalyst favors the synthesis of methanol through the formic acid pathway. This work presents a new approach to improving catalyst structure for CO2 hydrogenation.

Graphical Abstract