Confined‐Space Alloying of Nanoparticles for the Synthesis of Efficient PtNi Fuel‐Cell Catalysts |
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| Authors: | Claudio Baldizzone Stefano Mezzavilla Dr Hudson W P Carvalho Dr Josef Christian Meier Dr Anna K Schuppert Dr Marc Heggen Dr Carolina Galeano Prof?Dr Jan‐Dierk Grunwaldt Prof?Dr Ferdi Schüth Dr Karl J J Mayrhofer |
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| Affiliation: | 1. Department of Interface Chemistry and Surface Engineering, Max‐Planck‐Institut für Eisenforschung GmbH, Max‐Planck‐Strasse 1, 40237 Düsseldorf (Germany);2. Department of Heterogeneous Catalysi, Max‐Planck‐Institut für Kohlenforschung, Kaiser‐Wilhelm‐Platz 1, 45470 Mülheim an der Ruhr (Germany);3. Institute for Chemical Technology and Polymer Chemistry and Institute of Catalysis Research and Technology, Karlsruher Institut für Technologie (KIT), Kaiserstrasse 12 76131 Karlsruhe (Germany);4. Ernst Ruska Center for Microscopy and Spectroscopy with Electrons, Forschungzentrum Jülich GmbH, 52425 Jülich (Germany) |
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| Abstract: | The efficiency of polymer electrolyte membrane fuel cells is strongly depending on the electrocatalyst performance, that is, its activity and stability. We have designed a catalyst material that combines both, the high activity for the decisive cathodic oxygen reduction reaction associated with nanoscale Pt alloys, and the excellent durability of an advanced nanostructured support. Owing to the high specific activity and large active surface area, the catalyst shows extraordinary mass activity values of 1.0 A mgPt?1. Moreover, the material retains its initial active surface area and intrinsic activity during an extended accelerated aging test within the typical operation range. This excellent performance is achieved by confined‐space alloying of the nanoparticles in a controlled manner in the pores of the support. |
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| Keywords: | electrocatalysis fuel cells nanoparticles stability |
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