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Nanoporous High-Entropy Alloy by Liquid Metal Dealloying
| Content Provider | MDPI |
|---|---|
| Author | Okulov, Artem Vladimirovich Joo, Soo-Hyun Kim, Hyoung Seop Kato, Hidemi Okulov, Ilya Vladimirovich |
| Copyright Year | 2020 |
| 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 Ta19.1Mo20.5Nb22.9V30Ni7.5 alloy (at%) was fabricated from a precursor (TaMoNbV)25Ni75 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 Ta19.1Mo20.5Nb22.9V30Ni7.5 alloy (at%). The ligament size of this nanoporous HEA is about 69 ± 9 nm, indicating the high surface area in this material. |
| Starting Page | 1396 |
| e-ISSN | 20754701 |
| DOI | 10.3390/met10101396 |
| Journal | Metals |
| Issue Number | 10 |
| Volume Number | 10 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2020-10-21 |
| Access Restriction | Open |
| Subject Keyword | Metals Metallurgy and Metallurgical Engineering High-entropy Alloy Dealloying Liquid Metal Dealloying Nanoporous Catalysis |
| Content Type | Text |
| Resource Type | Article |
