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Eisencarbidnanopartikel mit graphitischer Hülle sind bei der Reduktion von Sauerstoff aktiv. In ihrer Zuschrift auf S. 3749 ff. berichten W. Xing, Q. F. Li et al., dass hohle Kugeln aus diesen Nanopartikeln ohne Oberflächenstickstoff oder funktionelle metallische Gruppen sowohl im sauren als auch im alkalischen Milieu eine hohe Aktivität und Stabilität zeigen. Die Katalysatoren können in einem einstufigen...
Nonprecious metal catalysts for the oxygen reduction reaction are the ultimate materials and the foremost subject for low‐temperature fuel cells. A novel type of catalysts prepared by high‐pressure pyrolysis is reported. The catalyst is featured by hollow spherical morphologies consisting of uniform iron carbide (Fe3C) nanoparticles encased by graphitic layers, with little surface nitrogen or metallic...
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