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首页> 外文期刊>International Journal of Electrochemical Science >A Cheap Polypyrrole-Derived Fe-N-C Electrocatalyst with Ultrahigh Oxygen Reduction Activity in Alkaline Electrolyte
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A Cheap Polypyrrole-Derived Fe-N-C Electrocatalyst with Ultrahigh Oxygen Reduction Activity in Alkaline Electrolyte

机译：一种廉价的聚吡咯衍生的Fe-N-C电催化剂，在碱性电解质中具有超高的氧还原活性

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Ternary Fe-N-C catalysts are regarded as the most promising candidates for low-cost alternatives to thePt-based materials for catalyzing the oxygen reduction reaction (ORR). In this paper, the Fe and N co-doped carbon catalyst (Fe-Py@K-800) with the unique foam-like 3D structure has been fabricated byusing the molecular sieve as a new solid-state template. The results of physical characterization indicatethat Fe atoms are coordinated with nitrogen atoms to form the Fe-N ORR-active structure. In contrastwith the commercial Pt/C catalyst, the Fe-Py@K-800 displays a comparable ORR electrocatalyticactivity with an onset potential of ~1.1 V and a half-wave potential of ~0.88 V (vs. RHE), however, thelong-term stability of Fe-Py@K-800 is obviously better. These results show that iron-organiccoordination in the pyrrole ring will play a role in the generation of nitrogen-rich active sites, whichfacilitates the enhancement of ORR activity in alkaline electrolyte.
机译：三元Fe-N-C催化剂被认为是用于催化氧还原反应（ORR）的Pt基材料的低成本替代品的最有希望的候选者。本文以分子筛为新的固态模板，制备了具有独特的泡沫状3D结构的Fe和N共掺杂碳催化剂（Fe-Py @ K-800）。物理表征结果表明Fe原子与氮原子配位形成Fe-N ORR活性结构。与商用Pt / C催化剂相比，Fe-Py @ K-800具有可比的ORR电催化活性，起始电势约为1.1 V，半波电势约为0.88 V（vs。RHE），然而， Fe-Py @ K-800的长期稳定性明显更好。这些结果表明，吡咯环中的铁-有机配位将在富氮活性位点的产生中起作用，这有助于增强碱性电解质中的ORR活性。

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