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<p>Global warming, environmental pollution, and climate change are critical challenges that demand immediate action through sustainable carbon capture and carbon utilization to mitigate their impacts. In this study, we synthesized a bismuth (Bi)-based metal–organic framework catalyst (CAU-17) with tunable morphology to investigate the impact of structural configuration on its electrocatalytic performance for the conversion of CO<sub>2</sub> to formic acid. The mixed hexagonal rod-like/plate-like structures of CAU-17 (M-CAU-17) expose abundant electrochemically active sites, which significantly enhances the efficiency of CO<sub>2</sub> conversion. At a potential of − 0.9&#xa0;V (versus RHE), M-CAU-17 achieved a maximum Faradaic efficiency (FE<sub>max</sub>%) of about 80% for formic acid production, accompanied by a total current density of about 3.7&#xa0;mA&#xa0;cm<sup>−2</sup>. Furthermore, the CO<sub>2</sub> electrolysis performance of M-CAU-17 exhibited exceptional stability over an extended period of 32&#xa0;h at − 0.9&#xa0;V (vs. RHE). This prolonged stability highlights the practical applicability of M-CAU-17 as a robust catalyst for sustained CO<sub>2</sub> reduction. These results underscore the significant potential of M-CAU-17 in selectively and efficiently producing formic acid. Overall, the study not only establishes the effectiveness of the catalyst but also offers a promising solution for sustainable carbon utilization and addressing environmental challenges.</p>

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Fabrication of Bi‐based metal‐organic framework for efficient electrocatalytic CO2 reduction to produce HCOOH

  • 期刊论文

  • 发表日期：

    2025年3月18日

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  • Jhong-Yi Lin,
  • Chun-Wei Huang,
  • Chun-Cheng Wang,
  • Han-Wei Chang,
  • Yu-Chen Tsai

摘要

Global warming, environmental pollution, and climate change are critical challenges that demand immediate action through sustainable carbon capture and carbon utilization to mitigate their impacts. In this study, we synthesized a bismuth (Bi)-based metal–organic framework catalyst (CAU-17) with tunable morphology to investigate the impact of structural configuration on its electrocatalytic performance for the conversion of CO2 to formic acid. The mixed hexagonal rod-like/plate-like structures of CAU-17 (M-CAU-17) expose abundant electrochemically active sites, which significantly enhances the efficiency of CO2 conversion. At a potential of − 0.9 V (versus RHE), M-CAU-17 achieved a maximum Faradaic efficiency (FEmax%) of about 80% for formic acid production, accompanied by a total current density of about 3.7 mA cm−2. Furthermore, the CO2 electrolysis performance of M-CAU-17 exhibited exceptional stability over an extended period of 32 h at − 0.9 V (vs. RHE). This prolonged stability highlights the practical applicability of M-CAU-17 as a robust catalyst for sustained CO2 reduction. These results underscore the significant potential of M-CAU-17 in selectively and efficiently producing formic acid. Overall, the study not only establishes the effectiveness of the catalyst but also offers a promising solution for sustainable carbon utilization and addressing environmental challenges.