Cobalt Phenanthroline-Indole Macrocycles as Highly Active Electrocatalysts for Oxygen Reduction
作者:Martin Quernheim、Haiwei Liang、Qi Su、Martin Baumgarten、Nobuyoshi Koshino、Hideyuki Higashimura、Klaus Müllen
DOI:10.1002/chem.201404454
日期:2014.10.27
[CoN4], based on the phenanthroline–indole macrocyclic ligand (PIM) is reported. This unique ligand allows the formation of mono‐ and dinuclear complexes with defined active sites that facilitate the direct four‐electron reduction of oxygen. Electrochemical measurements revealed that the [CoN4]/C (20 wt %) catalysts have a high activity and long‐term stability for the oxygen‐reduction reaction (ORR) under
稀有和昂贵的铂族物种的替代对燃料电池的开发提出了挑战。报道了一种基于菲咯啉-吲哚大环配体(PIM)的新型Co II -N 4大环配合物[CoN 4 ]的设计与合成。这种独特的配体可以形成具有定义的活性位点的单核和双核络合物,从而促进氧的直接四电子还原。电化学测量表明,[CoN 4与Pt / C催化剂相似,] / C(20 wt%)催化剂对碱性条件下的氧还原反应(ORR)具有很高的活性和长期稳定性。这些结构明确的复合物代表了未来燃料电池应用中铂族物质的非贵重替代品。