Dealloying of Quasi-High Entropy Alloys: Fabrication of Porous Noble Metals/Metal Oxides
High entropy alloys (HEAs) have been widely studied due to their special crystal structure, but their bulk structure and low specific surface area limit their further application in broader fields. In this work, the dealloying of precious metal Cu<sub>35</sub>Pd<sub>35</sub>N...
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MDPI AG
2025-01-01
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| author | Ziying Meng Jun Zhou Chunling Qin Zhifeng Wang |
| author_facet | Ziying Meng Jun Zhou Chunling Qin Zhifeng Wang |
| author_sort | Ziying Meng |
| collection | DOAJ |
| description | High entropy alloys (HEAs) have been widely studied due to their special crystal structure, but their bulk structure and low specific surface area limit their further application in broader fields. In this work, the dealloying of precious metal Cu<sub>35</sub>Pd<sub>35</sub>Ni<sub>25</sub>Ag<sub>5</sub> quasi-HEAs is performed. Porous noble metals with micro prism array structure and porous noble metal PdO/Ag<sub>2</sub>O/NiO oxides with nano “ligament/pore” structure are obtained by constant potential dealloying and free dealloying, respectively. In this way, the porosification of quasi-HEAs and noble metal oxides is achieved. Moreover, the effects of dealloying parameters on pore morphology and phase structure of dealloyed materials are studied, and the evolution mechanisms of pore structures of different dealloying products are discussed. The work provides strategies for the preparation of porous precious metal quasi-HEAs and porous noble metal oxides by the dealloying method. These products present great potential for application as functional materials in hot fields such as catalysis and energy storage. |
| format | Article |
| id | doaj-art-e1f8f8cb9b4a43648350408fa00c3ba4 |
| institution | DOAJ |
| issn | 2075-4701 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj-art-e1f8f8cb9b4a43648350408fa00c3ba42025-08-20T02:44:39ZengMDPI AGMetals2075-47012025-01-0115211410.3390/met15020114Dealloying of Quasi-High Entropy Alloys: Fabrication of Porous Noble Metals/Metal OxidesZiying Meng0Jun Zhou1Chunling Qin2Zhifeng Wang3“The Belt and Road Initiative” Advanced Materials International Joint Research Center of Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China“The Belt and Road Initiative” Advanced Materials International Joint Research Center of Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China“The Belt and Road Initiative” Advanced Materials International Joint Research Center of Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China“The Belt and Road Initiative” Advanced Materials International Joint Research Center of Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, ChinaHigh entropy alloys (HEAs) have been widely studied due to their special crystal structure, but their bulk structure and low specific surface area limit their further application in broader fields. In this work, the dealloying of precious metal Cu<sub>35</sub>Pd<sub>35</sub>Ni<sub>25</sub>Ag<sub>5</sub> quasi-HEAs is performed. Porous noble metals with micro prism array structure and porous noble metal PdO/Ag<sub>2</sub>O/NiO oxides with nano “ligament/pore” structure are obtained by constant potential dealloying and free dealloying, respectively. In this way, the porosification of quasi-HEAs and noble metal oxides is achieved. Moreover, the effects of dealloying parameters on pore morphology and phase structure of dealloyed materials are studied, and the evolution mechanisms of pore structures of different dealloying products are discussed. The work provides strategies for the preparation of porous precious metal quasi-HEAs and porous noble metal oxides by the dealloying method. These products present great potential for application as functional materials in hot fields such as catalysis and energy storage.https://www.mdpi.com/2075-4701/15/2/114dealloyingporous metalshigh entropy alloymetal oxides |
| spellingShingle | Ziying Meng Jun Zhou Chunling Qin Zhifeng Wang Dealloying of Quasi-High Entropy Alloys: Fabrication of Porous Noble Metals/Metal Oxides Metals dealloying porous metals high entropy alloy metal oxides |
| title | Dealloying of Quasi-High Entropy Alloys: Fabrication of Porous Noble Metals/Metal Oxides |
| title_full | Dealloying of Quasi-High Entropy Alloys: Fabrication of Porous Noble Metals/Metal Oxides |
| title_fullStr | Dealloying of Quasi-High Entropy Alloys: Fabrication of Porous Noble Metals/Metal Oxides |
| title_full_unstemmed | Dealloying of Quasi-High Entropy Alloys: Fabrication of Porous Noble Metals/Metal Oxides |
| title_short | Dealloying of Quasi-High Entropy Alloys: Fabrication of Porous Noble Metals/Metal Oxides |
| title_sort | dealloying of quasi high entropy alloys fabrication of porous noble metals metal oxides |
| topic | dealloying porous metals high entropy alloy metal oxides |
| url | https://www.mdpi.com/2075-4701/15/2/114 |
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