Nitrogen-doped porous carbon as-mediated by a facile solution combustion synthesis for supercapacitor and oxygen reduction electrocatalyst
Nitrogen-doped porous carbon as-mediated by a facile solution combustion synthesis for supercapacitor and oxygen reduction electrocatalyst
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DOI：
10.1016/j.cej.2018.06.001
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发表时间：
2018-10
影响因子：
15.1
通讯作者：
Chunyu Zhu;Manami Takata;Y. Aoki;H. Habazaki
中科院分区：
文献类型：
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作者：
Chunyu Zhu;Manami Takata;Y. Aoki;H. Habazaki
多孔炭材料因其独特的结构和上级性能而成为电化学储能材料的研究热点。本文报道了一种新颖、简便的制备具有多级多孔结构的氮掺杂多孔碳的方法。采用MgO模板法，以硝酸镁-甘氨酸溶液燃烧合成法（SCS）为催化剂，研究了煅烧温度、甘氨酸与硝酸盐配比等制备条件对NPC的影响。NPC显示出高达1958 m2 g − 1的高比表面积，并且包含相互连接的大孔、中孔和微孔的分级多孔。当用作ORR电催化剂时，NPC-n2-1000样品显示出最高的活性，良好的耐久性和对甲醇的高耐受性，这是报道的最好的碳基催化剂之一。NPC样品也显示出作为超级电容器活性电极材料的巨大潜力。NPC-n2-900样品在6 M KOH电解液中1 A g− 1时的高比电容为232 F g− 1，具有优异的上级倍率性能（10 A g−1时为205 F g− 1）和良好的循环性能。目前的工作表明，甘氨酸-硝酸盐SCS和模板引入的组合可以一步将碳水化合物燃料转化为先进的多孔碳，在高性能储能装置中具有潜在的应用前景。
Porous carbon has attracted great interest because of its distinctive structure and superior properties for designing electrochemical energy storage devices. In this work, we report a novel and facile method to fabricate nitrogen-doped porous carbon (NPC) with designed hierarchical multi-porous structure. The NPC is prepared using a facile and scalable MgO template method as-mediated by a magnesium nitrate-glycine solution combustion synthesis (SCS), in which the preparation conditions of calcination temperature and glycine-nitrate ratio are carefully studied. The NPC shows a high specific surface area up to 1958 m2g−1and contains hierarchical multi-pores of interconnected macro-, meso- and micro-pores. When applied as ORR electrocatalyst, the NPC-n2-1000 sample shows the highest activity, good durability and high tolerance against methanol, which is among the best reported carbon-base catalysts. The NPC samples also shows great potential as the active electrode material for supercapacitors. NPC-n2-900 sample exhibits a high specific capacitance of 232 F g−1at 1 A g−1in 6 M KOH electrolyte, a superior rate capability (205 F g−1at 10 A g−1) and a good cycling performance. The present work demonstrates that the combination of glycine-nitrate SCS and template introduction in one-step can turn the carbohydrate fuel to advanced porous carbon with prospective applications in high-performance energy storage devices.