Nanoporous High-Entropy Alloy by Liquid Metal Dealloying
High-entropy nanomaterials possessing high accessible surface areas have demonstrated outstanding catalytic performance, beating that found for noble metals. In this communication, we report about the synthesis of a new, nanoporous, high-entropy alloy (HEA) possessing open porosity. The nanoporous,...
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MDPI AG
2020-10-01
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| Online Access: | https://www.mdpi.com/2075-4701/10/10/1396 |
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| author | Artem Vladimirovich Okulov Soo-Hyun Joo Hyoung Seop Kim Hidemi Kato Ilya Vladimirovich Okulov |
| author_facet | Artem Vladimirovich Okulov Soo-Hyun Joo Hyoung Seop Kim Hidemi Kato Ilya Vladimirovich Okulov |
| author_sort | Artem Vladimirovich Okulov |
| collection | DOAJ |
| description | High-entropy nanomaterials possessing high accessible surface areas have demonstrated outstanding catalytic performance, beating that found for noble metals. In this communication, we report about the synthesis of a new, nanoporous, high-entropy alloy (HEA) possessing open porosity. The nanoporous, high-entropy Ta<sub>19.1</sub>Mo<sub>20.5</sub>Nb<sub>22.9</sub>V<sub>30</sub>Ni<sub>7.5</sub> alloy (at%) was fabricated from a precursor (TaMoNbV)<sub>25</sub>Ni<sub>75</sub> alloy (at%) by liquid metal dealloying using liquid magnesium (Mg). Directly after dealloying, the bicontinuous nanocomposite consisting of a Mg-rich phase and a phase with a bulk-centered cubic (bcc) structure was formed. The Mg-rich phase was removed with a 3M aqueous solution of nitric acid to obtain the open, porous, high-entropy Ta<sub>19.1</sub>Mo<sub>20.5</sub>Nb<sub>22.9</sub>V<sub>30</sub>Ni<sub>7.5</sub> alloy (at%). The ligament size of this nanoporous HEA is about 69 ± 9 nm, indicating the high surface area in this material. |
| first_indexed | 2024-03-10T15:27:40Z |
| format | Article |
| id | doaj.art-831691bb384e4b129346c71310fd2e20 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T15:27:40Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj.art-831691bb384e4b129346c71310fd2e202023-11-20T17:53:28ZengMDPI AGMetals2075-47012020-10-011010139610.3390/met10101396Nanoporous High-Entropy Alloy by Liquid Metal DealloyingArtem Vladimirovich Okulov0Soo-Hyun Joo1Hyoung Seop Kim2Hidemi Kato3Ilya Vladimirovich Okulov4Division of Materials Mechanics, Institute of Materials Research, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, GermanyInstitute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai 980-8577, JapanDepartment of Materials Science and Engineering Pohang, University of Science and Technology, 77 Cheongam-Ro, 37673 Pohang, KoreaInstitute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai 980-8577, JapanInstitute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai 980-8577, JapanHigh-entropy nanomaterials possessing high accessible surface areas have demonstrated outstanding catalytic performance, beating that found for noble metals. In this communication, we report about the synthesis of a new, nanoporous, high-entropy alloy (HEA) possessing open porosity. The nanoporous, high-entropy Ta<sub>19.1</sub>Mo<sub>20.5</sub>Nb<sub>22.9</sub>V<sub>30</sub>Ni<sub>7.5</sub> alloy (at%) was fabricated from a precursor (TaMoNbV)<sub>25</sub>Ni<sub>75</sub> alloy (at%) by liquid metal dealloying using liquid magnesium (Mg). Directly after dealloying, the bicontinuous nanocomposite consisting of a Mg-rich phase and a phase with a bulk-centered cubic (bcc) structure was formed. The Mg-rich phase was removed with a 3M aqueous solution of nitric acid to obtain the open, porous, high-entropy Ta<sub>19.1</sub>Mo<sub>20.5</sub>Nb<sub>22.9</sub>V<sub>30</sub>Ni<sub>7.5</sub> alloy (at%). The ligament size of this nanoporous HEA is about 69 ± 9 nm, indicating the high surface area in this material.https://www.mdpi.com/2075-4701/10/10/1396high-entropy alloydealloyingliquid metal dealloyingnanoporouscatalysis |
| spellingShingle | Artem Vladimirovich Okulov Soo-Hyun Joo Hyoung Seop Kim Hidemi Kato Ilya Vladimirovich Okulov Nanoporous High-Entropy Alloy by Liquid Metal Dealloying Metals high-entropy alloy dealloying liquid metal dealloying nanoporous catalysis |
| title | Nanoporous High-Entropy Alloy by Liquid Metal Dealloying |
| title_full | Nanoporous High-Entropy Alloy by Liquid Metal Dealloying |
| title_fullStr | Nanoporous High-Entropy Alloy by Liquid Metal Dealloying |
| title_full_unstemmed | Nanoporous High-Entropy Alloy by Liquid Metal Dealloying |
| title_short | Nanoporous High-Entropy Alloy by Liquid Metal Dealloying |
| title_sort | nanoporous high entropy alloy by liquid metal dealloying |
| topic | high-entropy alloy dealloying liquid metal dealloying nanoporous catalysis |
| url | https://www.mdpi.com/2075-4701/10/10/1396 |
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