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Synthesis of 3D N, S Dual‐Doped Porous Carbons with Ultrahigh Surface Areas for Highly Efficient Oxygen Reduction Reactions
ChemElectroChem ( IF 3.5 ) Pub Date : 2018-09-13 , DOI: 10.1002/celc.201800937 Yan-Zhen Liu 1 , Yong-Feng Li 2 , Shu-Xia Yuan 1 , Shuai Chen 1 , Cong-Wei Wang 1 , Xiao-Ming Li 1 , Fang-Yuan Su 1 , Cheng-Meng Chen 1
ChemElectroChem ( IF 3.5 ) Pub Date : 2018-09-13 , DOI: 10.1002/celc.201800937 Yan-Zhen Liu 1 , Yong-Feng Li 2 , Shu-Xia Yuan 1 , Shuai Chen 1 , Cong-Wei Wang 1 , Xiao-Ming Li 1 , Fang-Yuan Su 1 , Cheng-Meng Chen 1
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Replacing rare and expensive metal electrocatalysts with efficient, low‐cost, and stable ones for the oxygen reduction reactions (ORR) is of significant importance. Herein, we report a novel scalable synthesis of three‐dimensional (3D) N, S dual‐doped porous carbons (NSPCs) with ultrahigh surface areas that can serve as highly active, metal‐free electrocatalysts for the ORR. The NSPCs are prepared by synthesizing 3D black pillar foams from a mixture containing p‐nitroaniline and concentrated sulfuric acid, and subsequently carbonization under an Ar atmosphere. This method not only avoids the use of any template, but also allows for the simultaneous optimization of both porous structures and surface functionalities by tuning the carbonization temperature. Owing to the synergy of the tailored porous structure and N, S dual‐doping, the NSPC pyrolyzed at 1000 °C exhibits a good catalytic activity toward the ORR with a half‐wave potential of −0.10 V vs. Ag/AgCl and a high four electron (4e−) oxygen reduction selectivity in an alkaline medium, which is identical to that of the commercial 20 wt% Pt/C catalyst, and outperforms most previously reported metal‐free catalysts. The NSPCs also show good energy‐storage performance for advanced supercapacitors.
中文翻译：
具有高表面积的3D N，S双掺杂多孔碳的合成，可进行高效的氧还原反应
用高效，低成本和稳定的氧还原反应（ORR）替代稀有和昂贵的金属电催化剂具有重要意义。本文中，我们报告了一种新颖的可扩展合成的具有超高表面积的三维（3D）N，S双掺杂多孔碳（NSPC），可以用作ORR的高活性，无金属电催化剂。通过从包含对硝基苯胺和浓硫酸的混合物中合成3D黑色柱状泡沫，然后在Ar气氛下碳化来制备NSPC。该方法不仅避免使用任何模板，而且允许通过调节碳化温度同时优化多孔结构和表面功能。由于量身定制的多孔结构和N，S双掺杂的协同作用，−）在碱性介质中的氧还原选择性与商用20 wt％Pt / C催化剂相同，并且优于大多数先前报道的无金属催化剂。对于高级超级电容器，NSPC也显示出良好的储能性能。
更新日期：2018-09-13
中文翻译：
具有高表面积的3D N，S双掺杂多孔碳的合成，可进行高效的氧还原反应
用高效，低成本和稳定的氧还原反应（ORR）替代稀有和昂贵的金属电催化剂具有重要意义。本文中，我们报告了一种新颖的可扩展合成的具有超高表面积的三维（3D）N，S双掺杂多孔碳（NSPC），可以用作ORR的高活性，无金属电催化剂。通过从包含对硝基苯胺和浓硫酸的混合物中合成3D黑色柱状泡沫，然后在Ar气氛下碳化来制备NSPC。该方法不仅避免使用任何模板，而且允许通过调节碳化温度同时优化多孔结构和表面功能。由于量身定制的多孔结构和N，S双掺杂的协同作用，−）在碱性介质中的氧还原选择性与商用20 wt％Pt / C催化剂相同，并且优于大多数先前报道的无金属催化剂。对于高级超级电容器，NSPC也显示出良好的储能性能。
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