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首页> 外文期刊>ACS applied materials & interfaces >Nitrogen and Fluorine-Codoped Porous Carbons as Efficient Metal Free Electrocatalysts for Oxygen Reduction Reaction in Fuel Cells
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Nitrogen and Fluorine-Codoped Porous Carbons as Efficient Metal Free Electrocatalysts for Oxygen Reduction Reaction in Fuel Cells

机译：氮和氟编纂多孔碳作为燃料电池中的氧还原反应的有效金属游离电催化剂

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摘要

The severe dependence of oxygen reduction reaction (ORR.) in fuel cells on platinum (Pt)-based catalysts greatly limits the process of their commercialization. Therefore, developing cost-reasonable non-precious-metal catalysts to replace Pt-based catalysts for ORR is an urgent task. Here, we use the composite of inexpensive polyaniline and superfine polytetrafluoroethylene powder as precursor to synthesize a metal-free N,F-codoped porous carbon catalyst (N,F-Carbon). Results indicate that the N,F-Carbon catalyst obtained at the optimized temperature 1000 degrees C exhibits almost the same onset (0.97 V vs RHE) and half-wave potential(0.84 V vs RHE) and better durability and higher crossover resistance in alkaline medium compared to commercial 20% Pt/C, which is attributed to the good dispersion of fluorine and nitrogen atoms in the carbon matrix, high specific surface area, and the synergistic effects of fluorine and nitrogen On the polarization of adjacent carbon atoms. This work provides a new strategy for in situ synthesis of N,F-codoped porous carbon as highly efficient metal-free electrocatalyst for ORR in fuel cells.
机译：氧还原反应（ORR。）在铂（Pt）基催化剂上的燃料电池中的严重依赖性极大地限制了其商业化的过程。因此，开发成本合理的非珍贵金属催化剂以替代矿石的PT基催化剂是一种迫切的任务。这里，我们使用廉价的聚苯胺和超细聚四氟乙烯粉末作为前体的复合材料合成无金属N，F编号的多孔碳催化剂（N，F碳）。结果表明，在优化温度1000℃下获得的N，F-碳催化剂几乎相同的发作（0.97V VS RHE）和半波电位（0.84V Vs RHE），且碱性介质中的更好的耐久性和更高的交叉阻力与商业20％pt / c相比，其归因于氟和氮原子在碳基质，高比表面积和氟和氮在相邻碳原子的偏振上的协同作用的良好分散体。该作品为原位合成N，F编号多孔碳作为燃料电池中的ORR的高效金属电催化剂提供了一种新的策略。

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