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Confined-Space Alloying of Nanoparticles for the Synthesis of Efficient PtNi Fuel-Cell Catalysts

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

Angewandte Chemie (International ed.), 2014-12, Vol.53 (51), p.14250-14254 [Periódico revisado por pares]

Weinheim: WILEY-VCH Verlag

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  • Título:
    Confined-Space Alloying of Nanoparticles for the Synthesis of Efficient PtNi Fuel-Cell Catalysts
  • Autor: Baldizzone, Claudio ; Mezzavilla, Stefano ; Carvalho, Hudson W. P. ; Meier, Josef Christian ; Schuppert, Anna K. ; Heggen, Marc ; Galeano, Carolina ; Grunwaldt, Jan-Dierk ; Schüth, Ferdi ; Mayrhofer, Karl J. J.
  • Assuntos: Accelerated aging tests ; Active control ; Alloying ; Catalysis ; Catalysts ; Confined environments ; electrocatalysis ; Electrocatalysts ; Fuel cells ; Microelectronics ; Nanoparticles ; Nanostructure ; Platinum base alloys ; R&D ; Research & development ; stability
  • É parte de: Angewandte Chemie (International ed.), 2014-12, Vol.53 (51), p.14250-14254
  • Notas: ark:/67375/WNG-9J6L1972-5
    ArticleID:ANIE201406812
    We thank the DFG for the financial support through DFG/AiF-Cluster "Innovative Materialen und Verfahren für MT-PEM-Brennstoffzellen". Dr. C. Weidenthaler is gratefully acknowledged for the support in the XRD measurements. We also thank Dipl.-Ing. A. Mingers for the help in the ICP-MS measurements. C.B. acknowledges financial support from the IMPRS-SurMat doctoral program. We acknowledge the ANKA radiation synchrotron facility for proving beamtime at the XAS beamline.
    istex:B323E1E84D6AFE2948B15FE64AFDD922FB528E3B
    DFG
    IMPRS-SurMat doctoral program
    These authors contributed equally to this work.
    We thank the DFG for the financial support through DFG/AiF‐Cluster “Innovative Materialen und Verfahren für MT‐PEM‐Brennstoffzellen”. Dr. C. Weidenthaler is gratefully acknowledged for the support in the XRD measurements. We also thank Dipl.‐Ing. A. Mingers for the help in the ICP‐MS measurements. C.B. acknowledges financial support from the IMPRS‐SurMat doctoral program. We acknowledge the ANKA radiation synchrotron facility for proving beamtime at the XAS beamline.
    ObjectType-Article-1
    SourceType-Scholarly Journals-1
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  • Descrição: 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. Forever young catalysts: An excellently performing electrocatalyst for the oxygen reduction reaction (ORR) is prepared by confined‐space alloying of nanoparticles in the pores of a carbon support. Owing to the high specific activity and the small particle size even after thermal annealing, the catalyst has a high mass activity. The nanoparticles are also highly stable in accelerated aging tests.
  • Editor: Weinheim: WILEY-VCH Verlag
  • Idioma: Inglês
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