The oxygen reduction reaction (ORR) in a cathode is an essential component of many electrochemical energy storage and conversion systems. Two‐dimensional materials are beneficial for electron conduction and mass transport with high density, showing prominent electrochemical catalytic performance towards the ORR. Herein, a simple NaCl‐assisted method to synthesize cobalt–nitrogen‐doped carbon materials (CoNC), which present prominent performance towards the ORR in alkaline media, is described. The utilization of the NaCl template endows the product with a large specific surface area of 556.4 m² g⁻¹, as well as good dispersion of cobalt nanoparticles. CoNC‐800@NaCl (800 indicates the calcination temperature in °C) displays an excellent onset potential of 0.94 V (vs. a reversible hydrogen electrode), which is close to that of commercial Pt/C. Additionally, CoNC‐800@NaCl also exhibits better long‐term durability and methanol tolerance than that of Pt/C. The high‐performance CoNC‐800@NaCl catalyst provides a hopeful alternative to noble‐metal catalysts for the ORR in practical applications.

中文翻译：

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以氯化钠为模板的钴和氮共掺杂碳纳米片，作为高效的减氧电催化剂

阴极中的氧还原反应（ORR）是许多电化学储能和转化系统的重要组成部分。二维材料有利于高密度的电子传导和质量传输，对ORR表现出突出的电化学催化性能。本文描述了一种简单的NaCl辅助方法来合成钴氮掺杂碳材料（CoNC），该材料在碱性介质中对ORR表现出突出的性能。NaCl模板的利用使产品具有556.4 m ²  g ^-1的大比表面积以及钴纳米颗粒的良好分散性。CoNC-800 @ NaCl（800表示煅烧温度，以°C为单位）显示出0.94 V（相对于可逆氢电极）的极好的起始电势，接近于商用Pt / C。此外，CoNC-800 @ NaCl还具有比Pt / C更好的长期耐久性和甲醇耐受性。高性能的CoNC-800 @ NaCl催化剂为实际应用中的ORR提供了一种有希望的替代贵金属催化剂的方法。