Stability of high-entropy alloys under electrocatalytic conditions
Summary: High-entropy alloys are claimed to possess superior stability due to thermodynamic contributions. However, this statement mostly lies on a hypothetical basis. In this study, we use on-line inductively coupled plasma mass spectrometer to investigate the dissolution of five representative ele...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-10-01
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| Series: | iScience |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2589004223018527 |
| _version_ | 1797647913873047552 |
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| author | Attila Kormányos Qi Dong Bin Xiao Tangyuan Li Alan Savan Ken Jenewein Tatiana Priamushko Andreas Körner Thomas Böhm Andreas Hutzler Liangbing Hu Alfred Ludwig Serhiy Cherevko |
| author_facet | Attila Kormányos Qi Dong Bin Xiao Tangyuan Li Alan Savan Ken Jenewein Tatiana Priamushko Andreas Körner Thomas Böhm Andreas Hutzler Liangbing Hu Alfred Ludwig Serhiy Cherevko |
| author_sort | Attila Kormányos |
| collection | DOAJ |
| description | Summary: High-entropy alloys are claimed to possess superior stability due to thermodynamic contributions. However, this statement mostly lies on a hypothetical basis. In this study, we use on-line inductively coupled plasma mass spectrometer to investigate the dissolution of five representative electrocatalysts in acidic and alkaline media and a wide potential window targeting the most important applications. To address both model and applied systems, we synthesized thin films and carbon-supported nanoparticles ranging from an elemental (Pt) sample to binary (PtRu), ternary (PtRuIr), quaternary (PtRuIrRh), and quinary (PtRuIrRhPd) alloy samples. For certain metals in the high-entropy alloy under alkaline conditions, lower dissolution was observed. Still, the improvement was not striking and can be rather explained by the lowered concentration of elements in the multinary alloys instead of the synergistic effects of thermodynamics. We postulate that this is because of dissolution kinetic effects, which are always present under electrocatalytic conditions, overcompensating thermodynamic contributions. |
| first_indexed | 2024-03-11T15:23:28Z |
| format | Article |
| id | doaj.art-b5b77f2c7d6d412ca5ced1f99a72d2ec |
| institution | Directory Open Access Journal |
| issn | 2589-0042 |
| language | English |
| last_indexed | 2024-03-11T15:23:28Z |
| publishDate | 2023-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | iScience |
| spelling | doaj.art-b5b77f2c7d6d412ca5ced1f99a72d2ec2023-10-28T05:08:23ZengElsevieriScience2589-00422023-10-012610107775Stability of high-entropy alloys under electrocatalytic conditionsAttila Kormányos0Qi Dong1Bin Xiao2Tangyuan Li3Alan Savan4Ken Jenewein5Tatiana Priamushko6Andreas Körner7Thomas Böhm8Andreas Hutzler9Liangbing Hu10Alfred Ludwig11Serhiy Cherevko12Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstraße 1, 91058 Erlangen, Germany; Department of Physical Chemistry and Materials Science, University of Szeged, Aradi sq. 1, 6720 Szeged, Hungary; Corresponding authorDepartment of Materials Science and Engineering, University of Maryland, College Park, MD 20742, United StatesMaterials Discovery and Interfaces, Institute for Materials, Ruhr-Universität Bochum, 44801 Bochum, GermanyDepartment of Materials Science and Engineering, University of Maryland, College Park, MD 20742, United StatesMaterials Discovery and Interfaces, Institute for Materials, Ruhr-Universität Bochum, 44801 Bochum, GermanyForschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstraße 1, 91058 Erlangen, Germany; Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, GermanyForschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstraße 1, 91058 Erlangen, GermanyForschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstraße 1, 91058 Erlangen, GermanyForschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstraße 1, 91058 Erlangen, GermanyForschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstraße 1, 91058 Erlangen, GermanyDepartment of Materials Science and Engineering, University of Maryland, College Park, MD 20742, United States; Center for Materials Innovation, University of Maryland, College Park, MD 20742, United StatesMaterials Discovery and Interfaces, Institute for Materials, Ruhr-Universität Bochum, 44801 Bochum, GermanyForschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstraße 1, 91058 Erlangen, Germany; Corresponding authorSummary: High-entropy alloys are claimed to possess superior stability due to thermodynamic contributions. However, this statement mostly lies on a hypothetical basis. In this study, we use on-line inductively coupled plasma mass spectrometer to investigate the dissolution of five representative electrocatalysts in acidic and alkaline media and a wide potential window targeting the most important applications. To address both model and applied systems, we synthesized thin films and carbon-supported nanoparticles ranging from an elemental (Pt) sample to binary (PtRu), ternary (PtRuIr), quaternary (PtRuIrRh), and quinary (PtRuIrRhPd) alloy samples. For certain metals in the high-entropy alloy under alkaline conditions, lower dissolution was observed. Still, the improvement was not striking and can be rather explained by the lowered concentration of elements in the multinary alloys instead of the synergistic effects of thermodynamics. We postulate that this is because of dissolution kinetic effects, which are always present under electrocatalytic conditions, overcompensating thermodynamic contributions.http://www.sciencedirect.com/science/article/pii/S2589004223018527Electrochemical materials scienceInterfacial electrochemistryNanoelectrochemistry |
| spellingShingle | Attila Kormányos Qi Dong Bin Xiao Tangyuan Li Alan Savan Ken Jenewein Tatiana Priamushko Andreas Körner Thomas Böhm Andreas Hutzler Liangbing Hu Alfred Ludwig Serhiy Cherevko Stability of high-entropy alloys under electrocatalytic conditions iScience Electrochemical materials science Interfacial electrochemistry Nanoelectrochemistry |
| title | Stability of high-entropy alloys under electrocatalytic conditions |
| title_full | Stability of high-entropy alloys under electrocatalytic conditions |
| title_fullStr | Stability of high-entropy alloys under electrocatalytic conditions |
| title_full_unstemmed | Stability of high-entropy alloys under electrocatalytic conditions |
| title_short | Stability of high-entropy alloys under electrocatalytic conditions |
| title_sort | stability of high entropy alloys under electrocatalytic conditions |
| topic | Electrochemical materials science Interfacial electrochemistry Nanoelectrochemistry |
| url | http://www.sciencedirect.com/science/article/pii/S2589004223018527 |
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