Toward controllable and predictable synthesis of high-entropy alloy nanocrystals.
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| Název: | Toward controllable and predictable synthesis of high-entropy alloy nanocrystals. |
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| Autoři: | Liu, Yi-Hong, Hsieh, Chia-Jui, Hsu, Liang-Ching, Lin, Kun-Han, Hsiao, Yueh-Chun, Chi, Chong-Chi, Lin, Jui-Tai, Chang, Chun-Wei, Lin, Shang-Cheng, Wu, Cheng-Yu, Gao, Jia-Qi, Pao, Chih-Wen, Chang, Yin-Mei, Lu, Ming-Yen, Zhou, Shan, Yang, Tung-Han |
| Informace o vydavateli: | American Association for the Advancement of Science (AAAS) |
| Rok vydání: | 2023 |
| Sbírka: | The University of Liverpool Repository |
| Popis: | High-entropy alloy (HEA) nanocrystals have attracted extensive attention in catalysis. However, there are no effective strategies for synthesizing them in a controllable and predictable manner. With quinary HEA nanocrystals made of platinum-group metals as an example, we demonstrate that their structures with spatial compositions can be predicted by quantitatively knowing the reduction kinetics of metal precursors and entropy of mixing in the nanocrystals under dropwise addition of the mixing five-metal precursor solution. The time to reach a steady state for each precursor plays a pivotal role in determining the structures of HEA nanocrystals with homogeneous alloy and core-shell features. Compared to the commercial platinum/carbon and phase-separated counterparts, the dendritic HEA nanocrystals with a defect-rich surface show substantial enhancement in catalytic activity and durability toward both hydrogen evolution and oxidation. This quantitative study will lead to a paradigm shift in the design of HEA nanocrystals, pushing away from the trial-and-error approach. |
| Druh dokumentu: | article in journal/newspaper |
| Popis souboru: | application/pdf |
| Jazyk: | English |
| Relation: | https://livrepository.liverpool.ac.uk/3179755/1/sciadv.adf9931%20%281%29.pdf; Collapse authors list. Liu, Yi-Hong orcid:0009-0004-5599-7685 , Hsieh, Chia-Jui, Hsu, Liang-Ching orcid:0000-0002-8603-9277 , Lin, Kun-Han orcid:0000-0001-6689-667X , Hsiao, Yueh-Chun orcid:0009-0004-6044-5076 , Chi, Chong-Chi orcid:0009-0001-0350-180X , Lin, Jui-Tai orcid:0009-0003-0824-8369 , Chang, Chun-Wei, Lin, Shang-Cheng, Wu, Cheng-Yu et al (show 6 more authors) , Gao, Jia-Qi, Pao, Chih-Wen orcid:0000-0001-7681-4391 , Chang, Yin-Mei, Lu, Ming-Yen orcid:0000-0003-1788-1425 , Zhou, Shan orcid:0000-0002-6476-3280 and Yang, Tung-Han orcid:0000-0002-6175-4207 (2023) Toward controllable and predictable synthesis of high-entropy alloy nanocrystals. Science advances, 9 (19). eadf9931-. ISSN 2375-2548, 2375-2548 |
| DOI: | 10.1126/sciadv.adf9931 |
| Dostupnost: | https://livrepository.liverpool.ac.uk/3179755/ https://doi.org/10.1126/sciadv.adf9931 https://livrepository.liverpool.ac.uk/3179755/1/sciadv.adf9931%20%281%29.pdf |
| Přístupové číslo: | edsbas.519EE60B |
| Databáze: | BASE |
Nájsť tento článok vo Web of Science | Abstrakt: | High-entropy alloy (HEA) nanocrystals have attracted extensive attention in catalysis. However, there are no effective strategies for synthesizing them in a controllable and predictable manner. With quinary HEA nanocrystals made of platinum-group metals as an example, we demonstrate that their structures with spatial compositions can be predicted by quantitatively knowing the reduction kinetics of metal precursors and entropy of mixing in the nanocrystals under dropwise addition of the mixing five-metal precursor solution. The time to reach a steady state for each precursor plays a pivotal role in determining the structures of HEA nanocrystals with homogeneous alloy and core-shell features. Compared to the commercial platinum/carbon and phase-separated counterparts, the dendritic HEA nanocrystals with a defect-rich surface show substantial enhancement in catalytic activity and durability toward both hydrogen evolution and oxidation. This quantitative study will lead to a paradigm shift in the design of HEA nanocrystals, pushing away from the trial-and-error approach. |
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| DOI: | 10.1126/sciadv.adf9931 |