A novel mechanism for metal alloying at the nanoscale
Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2018
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| Online Access: | http://hdl.handle.net/1721.1/118032 |
| _version_ | 1826199019615944704 |
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| author | Yu, Daiwei |
| author2 | Ju Li. |
| author_facet | Ju Li. Yu, Daiwei |
| author_sort | Yu, Daiwei |
| collection | MIT |
| description | Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018. |
| first_indexed | 2024-09-23T11:13:09Z |
| format | Thesis |
| id | mit-1721.1/118032 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T11:13:09Z |
| publishDate | 2018 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/1180322019-04-12T21:57:13Z A novel mechanism for metal alloying at the nanoscale Yu, Daiwei Ju Li. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science. Electrical Engineering and Computer Science. Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018. Cataloged from PDF version of thesis. Includes bibliographical references (pages 39-40). The controllable incorporation of multiple immiscible elements into a single nanoparticle merits untold scientific and technological potential, yet remains a challenge using conventional synthetic techniques. We propose a novel mechanism for metal alloying at the nanoscale, which provides a general route for alloying dissimilar elements into single-phase solid-solution nanoparticles, referred to as high-entropy-alloy nanoparticles (HEA-NPs). To validate the theory, we developed a facile carbothermal shock (CTS) method to synthesize a wide range of multicomponent (up to eight dissimilar elements) nanoparticles with a desired chemistry (composition), size, and phase (solid solution, phase-separated) by controlling the CTS parameters (substrate, temperature, shock duration, and heating/cooling rate). To prove utility, we synthesized quinary HEA-NPs as ammonia oxidation catalysts with -100% conversion and >99% nitrogen oxide selectivity over prolonged operations. This mechanism is distinct from previously reported alloying processes, which can bring about a new repertoire of alloys and nanostructures with unprecedented functionalities. by Daiwei Yu. S.M. 2018-09-17T15:54:36Z 2018-09-17T15:54:36Z 2018 2018 Thesis http://hdl.handle.net/1721.1/118032 1051458861 eng MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission. http://dspace.mit.edu/handle/1721.1/7582 40 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Electrical Engineering and Computer Science. Yu, Daiwei A novel mechanism for metal alloying at the nanoscale |
| title | A novel mechanism for metal alloying at the nanoscale |
| title_full | A novel mechanism for metal alloying at the nanoscale |
| title_fullStr | A novel mechanism for metal alloying at the nanoscale |
| title_full_unstemmed | A novel mechanism for metal alloying at the nanoscale |
| title_short | A novel mechanism for metal alloying at the nanoscale |
| title_sort | novel mechanism for metal alloying at the nanoscale |
| topic | Electrical Engineering and Computer Science. |
| url | http://hdl.handle.net/1721.1/118032 |
| work_keys_str_mv | AT yudaiwei anovelmechanismformetalalloyingatthenanoscale AT yudaiwei novelmechanismformetalalloyingatthenanoscale |