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Angew Chem Int Ed 53 (2014) 14250-14254

Confined-space alloying of nanoparticles as efficient fuel cell catalysts

by Claudio Baldizzone, Stefano Mezzavilla, Hudson W P Carvalho, Josef Christian Meier, Anna K Schuppert, Marc Heggen, Carolina Galeano, Jan-Dierk Grunwaldt, Ferdi Schüth, and Karl J J Mayrhofer

The efficiency of polymer electrolyte membrane fuel cells is strongly depending on the electrocatalyst performance, that is, its activity and stability. Scientists from the the Max-Planck-Institut für Eisenforschung, the Max-Planck-Institut für Kohlenforschung, the Karlsruher Institut für Technologie and the Ernst Ruska-Centrum 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. Moreover, the material retains its initial active surface area as shown by high resolution scanning transmission electron microscopy at the ER-C as well as its intrinsic activity during an extended accelerated aging test within the typical operation range. This excellent performance is achieved by confined-space alloying of the PtNi nanoparticles in a controlled manner in the pores of the spherical carbon support.

Further reading:

Claudio Baldizzone, Stefano Mezzavilla, Hudson W P Carvalho, Josefl Christian Meier, Anna K Schuppert, Marc Heggen, Carolina Galeano, Jan-Dierk Grunwaldt, Ferdi Schüth, and Karl J J Mayrhofer: Confined-space alloying of nanoparticles as efficient fuel cell catalysts,
Angew Chem Int Ed 53 (2014) 14250-14254.


   
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