基于超重力技术 Fe/Co/N-MCF 催化剂制备及其氧还原性能研究

占鑫 毛, 娜 付, 雪娇 石

摘要


开发高效、稳定的非贵金属氧还原（ORR）催化剂是促进燃料电池的商业化进程的关键。本研究利用超重力技术制备了一种优良的非贵金属 ORR 催化剂 Fe/Co/N-MCF，物理结果表明，通过超重力技术可以使少量的 Fe 均匀的附着在Fe/Co/N-MCF 催化剂表面，并且通过 X 射线光电子能谱学（XPS）揭示了 Fe 可以与来自 ZIF-67 中的 N 形成了可以作为氧还原活性位点的 Fe-Nx；电化学测试结果表明，通过超重力技术制备的 Fe/Co/N-MCF 催化剂的半波电位高出商业化 Pt/C 将近 31mV。而且，经过 10000s 计时电流老化测试后，Fe/Co/N-MCF 催化剂仅衰减 2.6%，远低于商业 Pt/C 的 23.3%。

关键词


超重力技术；氧还原反应；非贵金属催化剂；燃料电池

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参考


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DOI: https://doi.org/10.12346/etr.v3i2.3487

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