A controllable and scalable strategy is used for fabricating oxygen reduction reaction (ORR) catalysts with a single type of atomic Fe-N4 species as the active site for fuel cell applications. The resulting catalyst aFe@AC exhibits superior ORR activity in both acidic and alkaline solutions. This study provides a practical method of fabricating electrocatalysts with the target active sites for high-performance catalysis.

中文翻译：

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Fe–N4物种的可控制合成以减少酸性氧气

一种可控且可扩展的策略用于制造氧还原反应（ORR）催化剂，该催化剂具有单一类型的原子Fe-N4物种作为燃料电池应用的活性中心。所得的催化剂aFe @ AC在酸性和碱性溶液中均表现出优异的ORR活性。这项研究提供了一种制备具有目标活性位的高性能电催化催化剂的实用方法。