- AutorIn
- Sebastian Henning
- Hiroshi Ishikawa
- Laura Kühn
- Juan Herranz
- Elisabeth Müller
- Prof. Dr. Alexander Eychmüller
- Prof. Dr. Thomas J. Schmidt
- Titel
- Unsupported Pt-Ni Aerogels with Enhanced High Current Performance and Durability in Fuel Cell Cathodes
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:14-qucosa-238005
- Quellenangabe
- Angewandte Chemie : a journal of the Gesellschaft Deutscher Chemiker International Edition
Erscheinungsjahr: 2017
Auflage: 56
Heft: 36
Seiten: 10707-10710
ISSN: 1521-3773
DOI: 10.1002/anie.201704253 - Abstract (EN)
- Highly active and durable oxygen reduction catalysts are needed to reduce the costs and enhance the service life of polymer electrolyte fuel cells (PEFCs). This can be accomplished by alloying Pt with a transition metal (e.g. Ni) and by eliminating the corrodible, carbon based catalyst support - however, materials combining both approaches have seldom been implemented in PEFC cathodes. In this work, an unsupported Pt-Ni alloy nanochain ensemble (aerogel) demonstrates high current PEFC performance commensurate with that of a carbon supported benchmark (Pt/C) following optimization of the aerogel\'s catalyst layer (CL) structure. The latter is accomplished using a soluble filler to shift the CL\'s pore size distribution towards larger pores which improves reactant and product transport. Chiefly, the optimized PEFC aerogel cathodes display ≈ 2.5-fold larger surface-specific ORR activity than Pt/C and maintain 90% of the initial activity after an accelerated stress test (vs. 40% for Pt/C).
- Andere Ausgabe
- Link zum Artikel, der zuerst in der Zeitschrift 'Angewandte Chemie: a journal of the Gesellschaft Deutscher Chemiker (International Edition)' in der Wiley Online Library erschienen ist.
DOI: 10.1002/anie.201704253 - Freie Schlagwörter (DE)
- Legierungen, Elektrochemie, Energieumwandlung, Brennstoffzellen, Nanostrukturen
- Freie Schlagwörter (EN)
- alloys, electrochemistry, energy conversion, fuel cells, nanostructures
- Klassifikation (DDC)
- 540
- Klassifikation (RVK)
- VA 1120
- Publizierende Institution
- Technische Universität Dresden, Dresden
- URN Qucosa
- urn:nbn:de:bsz:14-qucosa-238005
- Veröffentlichungsdatum Qucosa
- 27.08.2018
- Dokumenttyp
- Artikel
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis