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首页> 外文期刊>RSC Advances >Principle understanding towards synthesizing Fe/N decorated carbon catalysts with pyridinic-N enriched and agglomeration-free features for lithium–oxygen batteries
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Principle understanding towards synthesizing Fe/N decorated carbon catalysts with pyridinic-N enriched and agglomeration-free features for lithium–oxygen batteries

机译：原理了解用吡啶-N富含吡啶-N富含吡啶-N富集和凝聚的锂 - 氧电池的富含碳催化剂的原理理解

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摘要

Metal-N-decorated carbon catalysts are cheap and effective alternatives for replacing the high-priced Pt-based ones in activating the reduction of oxygen for metal–air or fuel cells. The preparation of such heterogeneous catalysts often requires complex synthesis processes, including harsh acid treatment, secondary pyrolysis processes, etching, etc. , to make the heteroatoms evenly dispersed in the carbon substrates to obtain enhanced activities. Through combined experimental characterizations, we found that by precise control of the precursors added, a Fe/N uniformly distributed, agglomeration-free Fe/N decorated Super-P carbon material (FNDSP) can be easily obtained by a one-pot synthesis process with distinctly higher pyridinic-N content and elevated catalytic activity. An insight into this phenomenon was carefully demonstrated and also verified in Li–O _(2) batteries, which delivered a high discharging platform of 2.85 V and can be fully discharged with a capacity of 5811.5 mA h g _(carbon+catalyst) ~(?1) at the cut-off voltage of 2.5 V by the low-cost Super-P modified catalyst.
机译：金属-N装饰的碳催化剂是廉价且有效的替代方案，用于更换高价PT基于激活金属空气或燃料电池的氧气的减少。这种非均相催化剂的制备通常需要复杂的合成方法，包括苛性酸处理，次级热解过程，蚀刻等，以使杂原子均匀地分散在碳基材中以获得增强的活性。通过组合的实验表征，我们发现，通过精确控制所添加的前体，通过单盆合成方法可以容易地获得Fe / N均匀分布的凝聚的Fe / N装饰的超级P碳材料（FNDSP）明显较高的吡啶-N含量和升高的催化活性。仔细证明了对这种现象的洞察，并在Li-O _（2）电池中验证，该电池提供了高放电平台，速度为2.85 V，可以完全放电，容量为5811.5 mA Hg _（碳+催化剂）〜（ 1）通过低成本超级改性催化剂在2.5V的截止电压下。

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