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<p>The development of cost-effective materials with high electrochemical efficiency is essential for advancing energy storage and conversion technologies, particularly as alternatives to precious metal catalysts such as platinum. In this study, NH<sub>2</sub>–MIL–Fe (88), a metal–organic framework (MOF) with abundant mesoporous structures, was used as a precursor to synthesize a high-performance catalyst. A macroporous structure was constructed using SiO<sub>2</sub> as a hard template to enhance the dispersion of active sites. Subsequent selenation partially converted iron ions into FeSe<sub>2</sub>, yielding a multi-element-doped carbon (Fe–Se–N–C) catalyst with excellent oxygen reduction reaction (ORR) activity for low-temperature fuel cells. When used as a cathode catalyst in microbial fuel cells (MFCs), the Fe–Se–N–C catalyst achieved a maximum power density of 1071.17 mW m⁻<sup>2</sup>. Furthermore, the catalyst exhibited stable performance over a wide temperature range, highlighting its adaptability for practical MFC applications. This study presents a promising strategy for the rational design of MFC cathode catalysts, offering enhanced efficiency and stability under diverse operating conditions.</p> Graphical Abstract <p></p>

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Fe–MOF-derived selenium-doped Fe–N–C catalysts for efficient oxygen reduction in microbial fuel cells

  • 期刊论文

  • 发表日期：

    2025年7月7日

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  • Xiao-Tong Wu,
  • Fan-li Xiao,
  • Jun-Ying Zhong,
  • Qi-Wen Zhu,
  • Nan Li

摘要

The development of cost-effective materials with high electrochemical efficiency is essential for advancing energy storage and conversion technologies, particularly as alternatives to precious metal catalysts such as platinum. In this study, NH2–MIL–Fe (88), a metal–organic framework (MOF) with abundant mesoporous structures, was used as a precursor to synthesize a high-performance catalyst. A macroporous structure was constructed using SiO2 as a hard template to enhance the dispersion of active sites. Subsequent selenation partially converted iron ions into FeSe2, yielding a multi-element-doped carbon (Fe–Se–N–C) catalyst with excellent oxygen reduction reaction (ORR) activity for low-temperature fuel cells. When used as a cathode catalyst in microbial fuel cells (MFCs), the Fe–Se–N–C catalyst achieved a maximum power density of 1071.17 mW m⁻2. Furthermore, the catalyst exhibited stable performance over a wide temperature range, highlighting its adaptability for practical MFC applications. This study presents a promising strategy for the rational design of MFC cathode catalysts, offering enhanced efficiency and stability under diverse operating conditions.

Graphical Abstract