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<p>CO<sub>2</sub> conversion to CH<sub>3</sub>OH under mild conditions is of particular interest yet rather challenging. Both electro- and thermo-catalytic CO<sub>2</sub> reduction to CH<sub>3</sub>OH can only produce CH<sub>3</sub>OH in low concentration (typically mixed with water), requiring energy-intensive purification processes. Here we design a sun-simulated-driven tandem catalytic system comprising CO<sub>2</sub> electroreduction to syngas, and further photothermal conversion into high-purity CH<sub>3</sub>OH (volume fraction &gt; 97%). We construct a self-supporting electrocatalyst featuring dual active sites of Ni single atoms and encapsulated Co nanoparticles, which could produce syngas with a constant H<sub>2</sub>:CO ratio of ~2 via solar-powered CO<sub>2</sub> electroreduction. The generated syngas is subsequently fed into the photothermal module, which could produce high-purity CH<sub>3</sub>OH under 1 sun-light irradiation, with a rate of 0.238 g<sub>CH3OH</sub> g<sub>cat</sub><sup>–1</sup> h<sup>–1</sup>. This work demonstrates a feasible and sustainable route for directly converting CO<sub>2</sub> into high-purity CH<sub>3</sub>OH.</p>

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Sun-simulated-driven production of high-purity methanol from carbon dioxide

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年1月20日

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  • Jiqing Jiao,
  • Yanbin Ma,
  • Xiaoqian Han,
  • Awu Ergu,
  • Chao Zhang,
  • Pingping Chen,
  • Wei Liu,
  • Qiquan Luo,
  • Zhaolin Shi,
  • Han Xu,
  • Chen Chen,
  • Yaguang Li,
  • Tongbu Lu

摘要

CO2 conversion to CH3OH under mild conditions is of particular interest yet rather challenging. Both electro- and thermo-catalytic CO2 reduction to CH3OH can only produce CH3OH in low concentration (typically mixed with water), requiring energy-intensive purification processes. Here we design a sun-simulated-driven tandem catalytic system comprising CO2 electroreduction to syngas, and further photothermal conversion into high-purity CH3OH (volume fraction > 97%). We construct a self-supporting electrocatalyst featuring dual active sites of Ni single atoms and encapsulated Co nanoparticles, which could produce syngas with a constant H2:CO ratio of ~2 via solar-powered CO2 electroreduction. The generated syngas is subsequently fed into the photothermal module, which could produce high-purity CH3OH under 1 sun-light irradiation, with a rate of 0.238 gCH3OH gcat–1 h–1. This work demonstrates a feasible and sustainable route for directly converting CO2 into high-purity CH3OH.