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Cited by 63Electrocatalysts for Energy ConversionHigh Entropy Alloys StudiesCO2 Reduction Techniques and Catalysts

Acidic Hydrogen Evolution Electrocatalysis at High‐Entropy Alloys Correlates with its Composition‐Dependent Potential of Zero Charge

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Kim, Moonjoo, Batsa Tetteh, Emmanuel, Krysiak, Olga A., Savan, Alan, Xiao, Bin, Piotrowiak, Tobias Horst, Andronescu, Corina, Ludwig, Alfred +2 more·2023·Angewandte Chemie International Edition
DOI 10.1002/anie.202310069
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Abstract

The vast possibilities in the elemental combinations of high‐entropy alloys (HEAs) make it essential to discover activity descriptors for establishing rational electrocatalyst design principles. Despite the increasing attention on the potential of zero charge (PZC) of hydrogen evolution reaction (HER) electrocatalyst, neither the PZC of HEAs nor the impact of the PZC on the HER activity at HEAs has been described. Here, we use scanning electrochemical cell microscopy (SECCM) to determine the PZC and the HER activities of various elemental compositions of a Pt−Pd−Ru−Ir−Ag thin‐film HEA materials library (HEA‐ML) with high statistical reliability. Interestingly, the PZC of Pt−Pd−Ru−Ir−Ag is linearly correlated with its composition‐weighted average work function. The HER current density in acidic media positively correlates with the PZC, which can be explained by the preconcentration of H + in the electrical double layer at potentials negative of the PZC.

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  • The double-layer capacitance (Cdl) values present a positive correlation with the electrochemically active surface area (ECSA).

    “Typically, the double-layer capacitance (Cdl) values present a positive correlation with the electrochemically active surface area (ECSA),[37,38]”

    From Constructing Novel High‐Entropy Alloy Aerogels Platform for pH‐Universal Hydrogen Evolution Reaction with High Electrocatalytic Activity and Stability (2026) · cites this paper as [37]

    The Introduction discusses using double-layer capacitance (Cdl) to determine the potential of zero charge, and the Pt/Au measurement section describes its potential dependence. Neither passage addresses a positive correlation between Cdl and electrochemically active surface area; searches for ECSA and surface-area proportionality found no such statement in our copy. (LLM, conf=0.73)

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Authors
Kim, M., Batsa Tetteh, E., Krysiak, O. A., Savan, A., Xiao, B., Piotrowiak, T. H., Andronescu, C., Ludwig, A., Dong Chung, T., & Schuhmann, W.
Affiliations
  • Seoul National University (KR)
  • Analytical Chemistry—Center for Electrochemical Sciences (CES) Faculty of Chemistry and Biochemistry Ruhr University Bochum Universitätsstr. 150 D-44780 Bochum Germany
  • Ruhr University Bochum (DE)
  • University of Duisburg-Essen (DE)
  • Department of Chemistry Seoul National University Seoul 08826 Republic of Korea
Corresponding author
Schuhmann, Wolfgang
ORCID
Venue
Angewandte Chemie International Edition
Publisher
Wiley
Published
2023-08-17
Volume
62
Issue
39
Pages
e202310069-e202310069
ISSN
  • 1433-7851 (ISSN-L)
  • 1521-3773
DOI
10.1002/anie.202310069
OpenAlex
W4385520936
Cited by
63
References
0
Citations by year
2026: 19 · 2025: 25 · 2024: 19
FWCI
3.01
Type
journal article
Language
en
Open access
Licence
Locations
  • Angewandte Chemie International Edition (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Dokumentenrepositorium der RUB (Ruhr University Bochum) (submittedVersion, cc-by-nc-nd)
Funders
  • HORIZON EUROPE European Research Council (CasCat [833408])
  • HORIZON EUROPE Marie Sklodowska-Curie Actions (Sentinel [812398])
  • National Research Foundation of Korea (2021R1A5A1030054, 2022R1A2C3004327)
  • Deutsche Forschungsgemeinschaft (LU1175/26-1, 440951282)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Engineering › Mechanical Engineering › High Entropy Alloys Studies
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
Keywords
high-entropy alloys, hydrogen evolution reaction, potential of zero charge, acidic electrocatalysis, work function, electric double layer, scanning electrochemical cell microscopy, electrocatalyst design

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