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首页> 外文期刊>International Journal of Electrochemical Science >Preparation of Fe-N-Carbon Nanocoils as Catalyst for Oxygen Reduction Reaction
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Preparation of Fe-N-Carbon Nanocoils as Catalyst for Oxygen Reduction Reaction

机译：Fe-N-碳纳米线圈的制备及还原反应

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Carbon nanocoil (CNC) with large specific surface area of 398 m g was synthesized by heat- treatment of resorcinol and formaldehyde resin, and Fe-N-CNC and Fe-N-XC72 catalysts withvariously nominal Fe contents were prepared by carbonization of in-situ polymerized polyaniline in thepresence of CNC or XC72 and Fe species. The Fe-N-C catalysts were characterized by FourierTransformation Infrared Spectroscopy, X-ray Photoelectron Spectroscopy, Transmission ElectronMicroscopy, and then oxygen reduction reaction (ORR) activity and stability were determined bycyclic voltammetry (CV) and linear sweep voltammetry. Fe-N-CNC catalyst with Fe nominal contentof 5 wt% indicates more pyridinic and graphitic nitrogen, less pyrrolic nitrogen and total N/C ratio, italso demonstrates 30 mV more positive of half-wave potential compared to Fe-N-XC72 catalyst, and-1 after 1000 CV cycles at scan rate of 50 mVs , the half-wave potential of Fe-N-CNC catholically shifts20 mV respect to 40 mV of Fe-N-XC72. This is mainly due to CNC with unique morphology andhigher electron conductivity, which facilitate oxygen transportation and further reduction reaction. TheORR activities indicate that the type of nitrogen incorporating in carbon is far more important than thetotal content of nitrogen.
机译：通过间苯二酚和甲醛树脂的热处理合成了比表面积达398 mg的碳纳米管（CNC），原位碳化制备了标称Fe含量不同的Fe-N-CNC和Fe-N-XC72催化剂。 CNC或XC72和Fe物种存在的聚合聚苯胺通过傅里叶变换红外光谱，X射线光电子能谱，透射电子显微镜对Fe-N-C催化剂进行了表征，然后通过循环伏安法（CV）和线性扫描伏安法测定了氧还原反应（ORR）的活性和稳定性。 Fe标称含量为5 wt％的Fe-N-CNC催化剂表明更多的吡啶和石墨氮，更少的吡咯氮和总N / C比，并且还显示出比Fe-N-XC72催化剂的半波电势正值高30 mV，和-1在以50mVs的扫描速率进行1000CV循环之后，Fe-N-CNC的半波电位相对于Fe-N-XC72的40mV在天主教上偏移了20mV。这主要是由于CNC具有独特的形态和较高的电子电导率，从而促进了氧的运输和进一步的还原反应。 ORR活性表明，掺入碳中的氮的类型比氮的总含量重要得多。

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