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Cited by 87Electrocatalysts for Energy ConversionFuel Cells and Related MaterialsCatalytic Processes in Materials Science

Pt-Ni Aerogels as Unsupported Electrocatalysts for the Oxygen Reduction Reaction

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Henning, Sebastian, Kühn, Laura, Herranz, Juan, Durst, Julien, Binninger, Tobias, Nachtegaal, Maarten, Werheid, Matthias, Liu, Wei +4 more·2016·Journal of The Electrochemical Society
DOI 10.1149/2.0251609jes
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Abstract

The commercial feasibility of polymer electrolyte fuel cells (PEFCs) passes by the development of Pt-based, O 2 -reduction catalysts with greater activities and/or lower Pt-contents, as well as an improved stability. In an effort to tackle these requirements, unsupported bimetallic Pt-Ni nanoparticles (NPs) interconnected in the shape of nanochain networks (aerogels) were synthesized using a simple one-step reduction and gel formation process in aqueous solution. The products of this novel synthetic route were characterized by X-ray absorption spectroscopy to elucidate the materials' structure. Using electrochemical experiments, we probed the surface composition of the as-synthesized aerogels and of equivalent materials exposed to acid, and concluded that a Ni-(hydr)oxide side phase is present in the aerogel with a larger Ni-concentration. Regardless of this initial surface composition, the Pt-Ni aerogels feature a ≈3-fold increase of surface-specific ORR activity when compared to a commercial platinum-on-carbon catalyst, reaching the mass-specific requirement for application in automotive PEFCs.

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  • Only the Pd-Pt, Pt-Ni, and PdxAu-Pt core-shell aerogels have been reported to date.

    “only the Pd–Pt, Pt–Ni, and PdxAu-Pt core–shell aerogels have been reported to date.[15,16,40]”

    From Engineering Multimetallic Aerogels for pH‐Universal HER and ORR Electrocatalysis (2020) · cites this paper as [40]

    The Conclusions (page unavailable) report Pt–Ni aerogels but describe complete alloy formation for Pt₃Ni, not a core–shell structure. The paper therefore contradicts its use as evidence for a Pt–Ni core–shell aerogel. It does not establish the claim that only the three listed types had been reported. (LLM, conf=0.86)

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Authors
Henning, S., Kühn, L., Herranz, J., Durst, J., Binninger, T., Nachtegaal, M., Werheid, M., Liu, W., Adam, M., Kaskel, S., Eychmüller, A., & Schmidt, T. J.
Affiliations
  • Paul Scherrer Institute (CH)
  • Technische Universität Dresden (DE)
ORCID
Venue
Journal of The Electrochemical Society
Publisher
The Electrochemical Society
Published
2016
Volume
163
Issue
9
Pages
F998-F1003
ISSN
  • 0013-4651 (ISSN-L)
  • 1945-7111
DOI
10.1149/2.0251609jes
OpenAlex
W2467841842
Cited by
87
References
47
Citations by year
2026: 4 · 2025: 6 · 2024: 7 · 2023: 16 · 2022: 9 · 2021: 5 · 2020: 7 · 2019: 10 · 2018: 10 · 2017: 11 · 2016: 2
FWCI
2.99
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Journal of The Electrochemical Society (publishedVersion, cc-by)
  • DORA PSI (Paul Scherrer Institute) (submittedVersion, other-oa)
  • Repository for Publications and Research Data (ETH Zurich) (submittedVersion, cc-by)
  • ETH Zürich Research Collection
Funders
  • National Science Foundation
  • U.S. Department of Energy
  • Deutsche Forschungsgemeinschaft (EY16/18‐1)
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (EY 16/18-1, 20001E_151122/1)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
  • Physical Sciences › Materials Science › Materials Chemistry › Catalytic Processes in Materials Science
Keywords
aerogels, oxygen reduction reaction, proton exchange membrane fuel cells, electrocatalysts, surface composition, acid stability, mass-specific activity, platinum loading reduction

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