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Quernheim M, Liang H, Su Q, et al. Cobalt phenanthroline-indole macrocycles as highly active electrocatalysts for oxygen reduction. Chemistry. 2014;20(44):14178-83doi: 10.1002/chem.201404454.
Quernheim, M., Liang, H., Su, Q., Baumgarten, M., Koshino, N., Higashimura, H., & Müllen, K. (2014). Cobalt phenanthroline-indole macrocycles as highly active electrocatalysts for oxygen reduction. Chemistry (Weinheim an der Bergstrasse, Germany), 20(44), 14178-83. https://doi.org/10.1002/chem.201404454
Quernheim, Martin, et al. "Cobalt phenanthroline-indole macrocycles as highly active electrocatalysts for oxygen reduction." Chemistry (Weinheim an der Bergstrasse, Germany) vol. 20,44 (2014): 14178-83. doi: https://doi.org/10.1002/chem.201404454
Quernheim M, Liang H, Su Q, Baumgarten M, Koshino N, Higashimura H, Müllen K. Cobalt phenanthroline-indole macrocycles as highly active electrocatalysts for oxygen reduction. Chemistry. 2014 Oct 27;20(44):14178-83. doi: 10.1002/chem.201404454. Epub 2014 Oct 03. PMID: 25283436.
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Chemistry. 2014 Oct 27;20(44):14178-83. doi: 10.1002/chem.201404454. Epub 2014 Oct 03.

Cobalt phenanthroline-indole macrocycles as highly active electrocatalysts for oxygen reduction.

Chemistry (Weinheim an der Bergstrasse, Germany)

Martin Quernheim, Haiwei Liang, Qi Su, Martin Baumgarten, Nobuyoshi Koshino, Hideyuki Higashimura, Klaus Müllen

Affiliations

  1. Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz (Germany), Fax: (+49)?6131-379-350.

PMID: 25283436 DOI: 10.1002/chem.201404454

Abstract

The replacement of scarce and expensive platinum species poses a challenge in fuel-cell development. The design and synthesis of a novel type of Co(II) -N4 macrocyclic complex, [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 alkaline conditions, similar to the Pt/C catalyst. These structurally well-defined complexes represent a nonprecious alternative to platinum species for future fuel-cell applications.

© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: N ligands; cobalt complexes; electrocatalysts; macrocyclic ligands; oxygen reduction reaction

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