• Medientyp: E-Artikel
  • Titel: Core–Shell Structuring of Pure Metallic Aerogels towards Highly Efficient Platinum Utilization for the Oxygen Reduction Reaction
  • Beteiligte: Cai, Bin [Verfasser:in]; Hübner, Rene [Verfasser:in]; Sasaki, Kotaro [Verfasser:in]; Zhang, Yuanzhe [Verfasser:in]; Su, Dong [Verfasser:in]; Ziegler, Christoph [Verfasser:in]; Vukmirovic, Miomir [Verfasser:in]; Rellinghaus, Bernd [Verfasser:in]; Adzic, Radoslav [Verfasser:in]; Eychmüller, Alexander [Verfasser:in]
  • Erschienen: Weinheim: Wiley-VCH Verlag GmbH & Co KGaA, [2019]
  • Erschienen in: Angewandte Chemie ; 57,11 (2018), Seite 2963-2966
  • Sprache: Englisch
  • DOI: 10.1002/anie.201710997; 10.1002/anie.201710997
  • RVK-Notation: VA 1120 : Zeitschriften
  • Schlagwörter: oxygen reduction reaction ; Kern-Schale-Strukturen ; aerogelcore–shell structures ; Elektrokatalyse ; Sol-Gel-Prozesse ; electrocatalysis ; sol–gel processes ; Sauerstoffreduktionsreaktion
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  • Beschreibung: The development of core-shell structures remains a fundamental challenge for pure metallic aerogels. Here we report the synthesis of PdxAu-Pt core-shell aerogels comprised of an ultrathin Pt shell and a composition-tunable PdxAu alloy core. The universality of this strategy ensures the extension of core compositions to Pd-transition metal alloys. The core-shell aerogels exhibited largely improved Pt utilization efficiency for oxygen reduction reaction and their activities show a volcano-type relationship as a function of the lattice parameter of the core substrate. The maximum mass and specific activities are 5.25 A mg-1Pt and 2.53 mA cm-2, which are 18.7 and 4.1 times higher than those of Pt/C, respectively, demonstrating the superiority of the core-shell metallic aerogels. The proposed core-based activity descriptor provides a new possible strategy for the design of future core-shell electrocatalysts.
  • Zugangsstatus: Freier Zugang
  • Rechte-/Nutzungshinweise: Urheberrechtsschutz