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Core-Protected Platinum Monolayer Shell High-Stability Electrocatalysts for Fuel-Cell Cathodes

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  • This work was carried out at Brookhaven National Laboratory under contract no. DE-AC02-98CH10886, with the U.S. Department of Energy, Office of Science, and supported by its Division of Chemical Sciences, Geosciences, and Biosciences, and its Division of Materials Sciences and Engineering, within the Office of Basic Energy Sciences, and Toyota Motor Corporation. We thank the National Energy Research Scientific Computing (NERSC) Center, the Center for Functional Nanomaterials at Brookhaven National Laboratory, and Prof. M. C. Lin for CPU time. Work at the NSLS was supported by the DOE BES grant DE-FG02-03ER15688. We thank Hugh Isaacs and Radoslav Atanasoski for stimulating discussions.

Abstract

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Das geht unter die Haut: Von Platin-Monoschichten umhüllte Palladium-Nanopartikel sind hoch aktive Elektrokatalysatoren, in denen geringe Platinmengen effizient genutzt werden. Die Stabilität der Partikel ergibt sich dadurch, dass der Kern die Schale vor Auflösung schützt. Beim Test in Brennstoffzellen war auch nach 200 000 Potentialzyklen kein Platinverlust feststellbar, während einiges an Palladium verlorenging.

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