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Cited by 185Electrocatalysts for Energy ConversionCatalytic Processes in Materials ScienceCO2 Reduction Techniques and Catalysts

Core–Shell Structuring of Pure Metallic Aerogels towards Highly Efficient Platinum Utilization for the Oxygen Reduction Reaction

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Cai, Bin, Hübner, René, Sasaki, Kotaro, Zhang, Yuanzhe, Su, Dong, Ziegler, Christoph, Vukmirovic, Miomir B., Rellinghaus, Bernd +2 more·2018·Angewandte Chemie International Edition
DOI 10.1002/anie.201710997
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Abstract

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 composed 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 efficiencies for the 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 Pt−1 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.

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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 [15]

    The paper reports PdₓAu–Pt and Pd–Ni–Pt core–shell aerogels, but it also says it fabricated Pd₃Co–Pt and Pd₃Cu–Pt core–shell aerogels (main text, page unavailable; Figure S14). Those additional examples contradict the claim that only the three listed types had been reported. (LLM, conf=0.88)

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  • The preparation process of NMAs is costly and time-consuming, requiring a high concentration of precursors, a complicated procedure, and yielding uneven size of ligaments.

    “the preparation process of NMAs is costly and time-consuming, in addition to requirement of high concentration of precursors, complicated procedure, and uneven size of ligaments of NMAs.”

    From Ultrafast Generation of Nanostructured Noble Metal Aerogels by a Microwave Method for Electrocatalytic Hydrogen Evolution and Ethanol Oxidation (2021) · cites this paper as [21]

    The Additional information section reports hydrogel gelation times of one to five days, supporting the time-consuming aspect. It describes a “facile” preparation using 0.2 mM precursors, rather than a complicated procedure requiring high precursor concentrations. The cited passages do not establish that preparation is costly or that ligament sizes are uneven; page numbers are unavailable in our copy. (LLM, conf=0.85)

    Experimental — accuracy not yet measured

  • The lower stability of Pt/C might be attributed to the delamination of supported carbon during operation, while the self-supported Au-Pt aerogel does not have such issues.

    “The lower stability of Pt/C might be attributed to the delamination of supported carbon during operation, while the self-supported Au–Pt aerogel does not have such issues, as reported for the Pt–Pd and in Pt–Ni aerogels.[15,16]”

    From Engineering Multimetallic Aerogels for pH‐Universal HER and ORR Electrocatalysis (2020) · cites this paper as [15]

    The stability results (section labeled Abstract; page unavailable) report less mass-activity loss for a Pd20Au–Pt aerogel than for Pt/C after 10,000 cycles, and say the aerogel retained its network structure. The paper does not attribute Pt/C’s loss to carbon-support delamination; it discusses particle aggregation instead. Its tested aerogel is Pd–Au–Pt, not simply Au–Pt. (LLM, conf=0.85)

    Experimental — accuracy not yet measured

  • Unsupported trimetallic PdAuPt aerogel shows excellent performance toward the oxygen reduction reaction (ORR), outperforming state-of-the-art Pt/C catalysts.

    “unsupported trimetallic PdAuPt aerogel has been reported to show an excellent performance toward the oxygen reduction reaction (ORR), also outperforming the state-of-the-art Pt/C catalysts [36].”

    From Partially oxidized ruthenium aerogel as highly active bifunctional electrocatalyst for overall water splitting in both alkaline and acidic media (2022) · cites this paper as [36]

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Authors
Cai, B., Hübner, R., Sasaki, K., Zhang, Y., Su, D., Ziegler, C., Vukmirovic, M. B., Rellinghaus, B., Adzic, R. R., & Eychmüller, A.
Affiliations
  • Brookhaven National Laboratory (US)
  • Helmholtz-Zentrum Dresden-Rossendorf (DE)
  • Technische Universität Dresden (DE)
  • Leibniz Institute for Solid State and Materials Research (DE)
  • Chemistry Division and Center for Functional Nanomaterials Brookhaven National Laboratory Upton NY 11973 USA
Corresponding author
Eychmüller, Alexander
ORCID
Venue
Angewandte Chemie International Edition
Publisher
Wiley
Published
2018-02-08
Volume
57
Issue
11
Pages
2963-2966
ISSN
  • 1433-7851 (ISSN-L)
  • 1521-3773
DOI
10.1002/anie.201710997
OpenAlex
W2790566095
Cited by
185
References
39
Citations by year
2026: 10 · 2025: 12 · 2024: 11 · 2023: 22 · 2022: 21 · 2021: 26 · 2020: 35 · 2019: 29 · 2018: 19
FWCI
6.08
Type
journal article
Language
en
Open access
Licence
Locations
  • Angewandte Chemie International Edition (publishedVersion)
  • PubMed (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • Qucosa (Saxon State and University Library Dresden) (submittedVersion, other-oa)
Funders
  • U.S. Department of Energy (DE-SC0012704)
  • Deutsche Forschungsgemeinschaft (ZuK support the best)
  • FP7 Ideas: European Research Council (AdG AEROCAT)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Materials Science › Materials Chemistry › Catalytic Processes in Materials Science
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
Keywords
platinum utilization, oxygen reduction reaction, Au-Pd alloys, lattice parameters, electrocatalysts, mass and specific activity

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