Abstract

Single atom catalyst is of great importance for the oxygen reduction reaction (ORR). However, facile preparation of single atom catalyst without using well-designed precursors or labor-intensive acid leaching remains an urgent challenge. Herein, a simple pyrolysis of Fe³⁺-loaded mesoporous phenolic resin (mPF)-melamine precursor is used to prepare the single atom iron-anchored N-doped mesoporous graphitic carbon nanospheres (Fe/N-MGN). Investigation of the synthesis reveals the appropriate Fe-assisted catalysis effect and mPF template effect, which not only spurs the highly graphitic porous framework of Fe/N-MGN with plentiful pyridinic N/graphitic N, but also assures the dispersed single atom Fe anchoring without elaborated procedures. As a result, the as-synthesized Fe/N-MGN demonstrates high catalytic activity, good durability and excellent methanol tolerance for ORR. This work promises a facile method to regulate the graphitic carbon growth and single atom Fe loading for the highly efficient electrocatalysis.

中文翻译：

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通过容易的单原子铁生长将N掺杂的介孔碳纳米球石墨化以实现高效的氧还原反应

摘要

单原子催化剂对于氧还原反应（ORR）非常重要。然而，在不使用设计良好的前体或劳动密集型酸浸的情况下轻松地制备单原子催化剂仍然是迫在眉睫的挑战。这里，Fe ³⁺的简单热解负载的介孔酚醛树脂（mPF）-三聚氰胺前驱体用于制备单原子铁锚定的N掺杂介孔石墨碳纳米球（Fe / N-MGN）。合成研究表明适当的铁辅助催化作用和mPF模板作用，不仅激发了具有大量吡啶二氮/石墨氮的高石墨多孔度的Fe / N-MGN，而且还确保了分散的单原子Fe锚定而没有详细的程序。结果，所合成的Fe / N-MGN显示出高的催化活性，良好的耐久性和对ORR的优异的甲醇耐受性。这项工作有望为调节石墨碳的生长和高效电催化的单原子铁负载量提供一种简便的方法。