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Deep-Eutectic Solvents Derived Nitrogen-Doped Graphitic Carbon as a Superior Electrocatalyst for Oxygen Reduction
ACS Applied Materials & Interfaces ( IF 9.5 ) Pub Date : 2017-09-18 00:00:00 , DOI: 10.1021/acsami.7b09707
Rui Luo 1 , Chao Liu 1 , Jiansheng Li 1 , Chaohai Wang 1 , Xiuyun Sun 1 , Jinyou Shen 1 , Weiqing Han 1 , Lianjun Wang 1
Affiliation  

The activity and stability of electrocatalyst for oxygen reduction reaction (ORR) essentially depends on its structural and compositional properties. Herein, we report the facile preparation of nitrogen-doped graphitic carbon (NGC) via the pyrolysis of deep-eutectic solvents (DESs) as a superior electrocatalyst for ORR. The resulting NGCs possess high surface areas, rich nitrogen content, and favorable graphitization degree, all of which are highly desired for the ORR catalysts. The effects of the pyrolysis temperature on the ORR performance of the final products are explored. The results implied that the material fabricated at 900 °C (NGC900) is identified as the best ORR catalyst in the series of samples. Specifically, NGC900 shows efficient performance toward ORR with an onset potential of 0.97 V and a half potential of 0.84 V, which bears comparison with the commercial Pt/C catalyst with enhanced stability in the alkaline media. The superior ORR performance of NGC900 may be ascribed to the balance between the surface area, pyridinic nitrogen, and defect of NGCs. The rational design of NGCs with an efficient ORR activity and stability based on the low-cost DESs implies adequate support for the development of energy devices in practical application.

中文翻译:

深层共溶溶剂衍生的氮掺杂石墨碳作为还原氧的优良电催化剂

氧还原反应(ORR)的电催化剂的活性和稳定性基本上取决于其结构和组成性质。本文中,我们报告了通过深共熔溶剂(DESs)的热解作为ORR的优良电催化剂,可轻松制备氮掺杂石墨碳(NGC)。所得的NGC具有高的表面积,富氮含量和良好的石墨化度,所有这些对于ORR催化剂都是非常需要的。探索了热解温度对最终产物ORR性能的影响。结果表明,在900°C下制造的材料(NGC900)被认为是该系列样品中最好的ORR催化剂。具体来说,NGC900在启动电位为0.97 V,半电位为0.84 V的情况下显示出对ORR的高效性能,与市售的Pt / C催化剂相比,在碱性介质中具有更高的稳定性。NGC900优异的ORR性能可归因于表面积,吡啶氮和NGC缺陷之间的平衡。基于低成本DES的具有高效ORR活性和稳定性的NGC的合理设计,意味着在实际应用中为能源设备的开发提供了充分的支持。
更新日期:2017-09-19
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