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Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin, Germany http://www.tu-berlin.de
Contact Mr Dr. Marc Heggen +49 2461 619479
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Technische Universität Berlin

Geformter Superkatalysator für effiziente Brennstoffzellen

90 Prozent des teuren Platins eingespart / Veröffentlichung im renommierten "Journal Nature Materials"

(PresseBox) (Berlin, )
Chemische Energiespeicher und -wandler gelten als die Schlüsseltechnologie zur Nutzbarmachung von erneuerbarer, aber unregelmäßig anfallender Sonnen- oder Windelektrizität. Als Speichermedium mit einem großen wirtschaftlichen Nutzen kommt dabei dem Molekül Wasserstoff die größte Bedeutung zu. Es wird erzeugt durch Wasserspaltung mit Hilfe von elektrischem Strom, der Elektrolyse. Sowohl der Prozess der Wasserspaltung in Wasserstoff (und Sauerstoff) als auch der umgekehrte Prozess der Erzeugung von Elektrizität aus beiden Gasen in Brennstoffzellen sind sehr langsame chemische Reaktionen. Sie benötigen daher eine große Menge an Edelmetallkatalysatoren, um die Reaktionen sehr stark zu beschleunigen. Das teure Platin wird dafür eingesetzt. Es macht die elektrochemische Energiespeicherung
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