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Recent Progress on Fe/N/C Electrocatalysts for the Oxygen Reduction Reaction in Fuel Cells

机译：Fe / N / C电催化剂用于燃料电池中氧还原反应的最新进展

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In order to reduce the overall system cost, the development of inexpensive, high-performance and durable oxygen reduction reaction (ORR)N, Fe-codoped carbon-based (Fe/N/C) electrocatalysts to replace currently used Pt-based catalysts has become one of the major topics in research on fuel cells. This review paper lays the emphasis on introducing the progress made over the recent five years with a detailed discussion of recent work in the area of Fe/N/C electrocatalysts for ORR and the possible Fe-based active sites. Fe-based materials prepared by simple pyrolysis of transition metal salt, carbon support, and nitrogen-rich small molecule or polymeric compound are mainly reviewed due to their low cost, high performance, long stability and because they are the most promising for replacing currently used Pt-based catalysts in the progress of fuel cell commercialization. Additionally, Fe-base catalysts with small amount of Fe or new structure of Fe/Fe3C encased in carbon layers are presented to analyze the effect of loading and existence form of Fe on the ORR catalytic activity in Fe-base catalyst. The proposed catalytically Fe-centered active sites and reaction mechanisms from various authors are also discussed in detail, which may be useful for the rational design of high-performance, inexpensive, and practical Fe-base ORR catalysts in future development of fuel cells.
机译：为了降低整体系统成本，开发了廉价，高性能和耐用的氧还原反应（ORR）N，Fe掺杂的碳基（Fe / N / C）电催化剂来代替当前使用的Pt基催化剂成为燃料电池研究的主要主题之一。本文的重点是介绍近五年来的进展，并详细讨论了用于ORR的Fe / N / C电催化剂和可能的铁基活性位点领域的最新工作。通过对过渡金属盐，碳载体和富氮小分子或高分子化合物进行简单热解制备的铁基材料，由于其低成本，高性能，长稳定性以及最有可能替代目前使用的材料而受到了广泛的评价。铂基催化剂在燃料电池商业化的进展中。此外，提出了含少量Fe或新结构的Fe / Fe 3 C包裹在碳层中的Fe基催化剂，以分析Fe的负载和存在形式对ORR催化活性的影响。铁基催化剂。还详细讨论了各种作者提出的以Fe为中心的催化活性位点和反应机理，这可能对燃料电池未来开发中高性能，廉价且实用的Fe基ORR催化剂的合理设计有用。

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