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<p>Achieving carbon neutrality through CO<sub>2</sub> hydrogenation is critical for sustainable energy and chemical industries, where methanol production remains a key target. Despite existing catalysts, challenges persist in low CO<sub>2</sub> conversion, poor methanol selectivity, and activity instability. This study introduces a novel ternary Cu/Zn/Y catalyst synthesized via co-precipitation to address these limitations. Tested under 5&#xa0;MPa, 250&#xa0;°C, H<sub>2</sub>/CO<sub>2</sub> = 3:1, and 12,000&#xa0;h⁻¹, the catalyst achieved a CO<sub>2</sub> conversion rate of 16.6% and a methanol selectivity of 56.6%, outperforming the CuZnAl benchmark with a 14.3% higher methanol space-time yield (402.3&#xa0;mg/(gcat·h)). Optimal yttrium doping enhanced methanol selectivity by 20%, attributed to improved copper dispersion. However, excess Y occupancy disrupted Cu–Zn interactions, reducing CO<sub>2</sub> conversion and stability, highlighting critical trade-offs. These insight underscore the potential of Cu/Zn/Y catalysts for carbon-neutral technologies and emphasize the need for optimized Y doping to balance selectivity and stability.</p> Graphical Abstract <p></p>

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A Highly Selective CuZnY Catalyst for CO2 Hydrogenation to Methanol

  • 期刊论文

  • 发表日期：

    2025年5月23日

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  • Yao Cai,
  • Qi Wang,
  • Dingran Wang,
  • Tianfu Zhang,
  • Ting Fan,
  • Di Fu,
  • Yanghui Lu,
  • Gonggang Sun,
  • Xinbao Li,
  • Kaige Wang

摘要

Achieving carbon neutrality through CO2 hydrogenation is critical for sustainable energy and chemical industries, where methanol production remains a key target. Despite existing catalysts, challenges persist in low CO2 conversion, poor methanol selectivity, and activity instability. This study introduces a novel ternary Cu/Zn/Y catalyst synthesized via co-precipitation to address these limitations. Tested under 5 MPa, 250 °C, H2/CO2 = 3:1, and 12,000 h⁻¹, the catalyst achieved a CO2 conversion rate of 16.6% and a methanol selectivity of 56.6%, outperforming the CuZnAl benchmark with a 14.3% higher methanol space-time yield (402.3 mg/(gcat·h)). Optimal yttrium doping enhanced methanol selectivity by 20%, attributed to improved copper dispersion. However, excess Y occupancy disrupted Cu–Zn interactions, reducing CO2 conversion and stability, highlighting critical trade-offs. These insight underscore the potential of Cu/Zn/Y catalysts for carbon-neutral technologies and emphasize the need for optimized Y doping to balance selectivity and stability.

Graphical Abstract