Replacing Pt‐based catalysts with noble‐metal free catalysts for the oxygen reduction reaction (ORR) is one of the most important topics currently in electrocatalysis. Iron‐ and nitrogen‐doped carbon materials have shown great promise in this area. In this work, we demonstrate the remarkable electrocatalytic activity towards the ORR of carbide‐derived carbon (CDC) and multi‐walled carbon nanotube (MWCNT) composite catalysts. The CDC material is synthesized from titanium carbide and doped using 1,10‐phenanthroline and iron (II) acetate. The material is then mixed with MWCNTs and further modified with dicyandiamide (DCDA) and additional iron by using a multi‐step pyrolysis procedure. The morphology, structure, porosity, and elemental composition are then comprehensively studied with scanning electron microscopy, X‐ray photoelectron spectroscopy, N₂ physisorption, and inductively coupled plasma mass spectroscopy. The electrocatalytic activity of the catalysts for the ORR is studied using the rotating disk electrode method and in a single‐cell anion exchange membrane fuel cell using the Tokuyama A201 membrane.

中文翻译：

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铁和氮共掺杂碳化物衍生的碳和碳纳米管复合催化剂的氧还原反应

用无贵金属的催化剂代替Pt催化剂进行氧还原反应（ORR）是目前电催化领域最重要的主题之一。铁和氮掺杂的碳材料在这一领域显示出了巨大的希望。在这项工作中，我们证明了对碳化物衍生碳（CDC）和多壁碳纳米管（MWCNT）复合催化剂的ORR具有非凡的电催化活性。CDC材料是由碳化钛合成的，并使用1,10-菲咯啉和乙酸铁（II）进行掺杂。然后将材料与MWCNT混合，并通过多步热解程序用双氰胺（DCDA）和其他铁进一步改性。然后用扫描电子显微镜，X射线光电子能谱，N₂物理吸附和电感耦合等离子体质谱。使用转盘电极法和使用德山A201膜的单细胞阴离子交换膜燃料电池研究了ORR催化剂的电催化活性。