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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Iron-based clusters embedded in nitrogen doped activated carbon catalysts with superior cathodic activity in microbial fuel cells
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Iron-based clusters embedded in nitrogen doped activated carbon catalysts with superior cathodic activity in microbial fuel cells

机译：嵌入氮掺杂活性炭催化剂中的铁簇，具有优异的微生物燃料电池阴极活性

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摘要

Developing high-performance cathodic catalysts and exploiting new techniques to investigate the nanoscale process of the oxygen reduction reaction (ORR) are of significant importance for the wide application of microbial fuel cells (MFCs). Here, novel Fe-based clusters embedded in nitrogen doped activated carbon (Fe-clusters/NAC) catalysts were developed via a simple ball milling method. Abiotic electrochemical tests demonstrated that these Fe-clusters/NAC catalysts exhibited an enhanced ORR performance due to the formation of Fe-based clusters, and the exposure of abundant active sites including quaternary N, Fe-N and Fe-based clusters. More importantly, the Fe-clusters/NAC catalysts exhibited an even better ORR performance than Pt due to the existence of more active sites than Pt, which was confirmed by using a scanning electrochemical microscope. Acid etching treatment and density functional theory calculations further verified the superior ORR activity of Fe-based clusters. The power density of the Fe-clusters/NAC catalyst-based MFCs reached 2387 mW m(-2), which is the highest value among the reported Fe-N-C catalysts under the same/similar experimental conditions over the last five years, at least 65% higher than that of AC and 50% higher than that of commercial Pt.
机译：开发高性能阴极催化剂和利用新技术以研究氧还原反应（ORR）的纳米级过程对于广泛应用微生物燃料电池（MFC）具有重要意义。这里，通过简单的球磨方法开发出嵌入氮掺杂活性炭（Fe-簇/ NaC）催化剂中的新型Fe基簇。非生物电化学试验证明，由于Fe基簇的形成，这些Fe簇/ NAC催化剂表现出增强的ORR性能，以及包括季N，Fe-N和Fe基簇的丰富活性位点的暴露。更重要的是，Fe簇/ NAC催化剂表现出比PT的甚至更好的ORR性能，因为通过使用扫描电化学显微镜确认的比PT更具活性位点。酸蚀刻处理和密度官能理论计算进一步验证了Fe基簇的卓越ORR活性。基于Fe簇/ NAC催化剂的MFC的功率密度达到2387mWM（-2），这是在过去五年中相同/相似的实验条件下报告的Fe-NC催化剂中的最高值，至少比AC的65％高，比商业PT的50％高。

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  • 作者

    Zhang Xiaoyuan; Guo Xingguo; Wang Qiuying; Zhang Rufan; Xu Ting; Liang Peng; Huang Xia;

  • 作者单位

    Tsinghua Univ Sch Environm State Key Joint Lab Environm Simulat &

    Pollut Con Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Environm State Key Joint Lab Environm Simulat &

    Pollut Con Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Environm State Key Joint Lab Environm Simulat &

    Pollut Con Beijing 100084 Peoples R China;

    Tsinghua Univ Dept Chem Engn Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Environm State Key Joint Lab Environm Simulat &

    Pollut Con Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Environm State Key Joint Lab Environm Simulat &

    Pollut Con Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Environm State Key Joint Lab Environm Simulat &

    Pollut Con Beijing 100084 Peoples R China;

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  • 正文语种 eng
  • 中图分类 工程材料学;
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