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https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/127791
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| 題名: | Atomic Scale Synergistic Interactions Lead to Breakthrough Catalysts for Electrocatalytic Water Splitting |
| 作者: | Huang, Chun-Lung;Lin, Yan-Gu;Chiang, Chao-Lung;Peng, Chun-Kuo;Raja, Duraisamy Senthil;Hsieh, Cheng-Ting;Chen, Yu-An;Chang, Shun-Qin;Yeh, Yong-Xian;Lu, Shih-Yuan |
| 日期: | 2023/01/01 |
| 上傳時間: | 2025-09-17 12:06:45 (UTC+8) |
| 出版者: | Elsevier |
| 摘要: | A breakthrough catalyst for electrocatalytic water splitting, precious-metal-free equi-molar high entropy alloy H-FeCoNiCuMo, is developed through exploring and maximizing strong synergistic interactions between atomically well-mixed constituents of H-FeCoNiCuMo over atomic scales. For overall electrolytic water splitting under severe industrial operation conditions, the H-FeCoNiCuMo//H-FeCoNiCuMo couple requires only an ultralow cell voltage of 1.627 V to deliver an ultrahigh current density of 1500 mA cm−2, and remains stable after a 100-hr continuous operation, largely outperforming a precious metal-based benchmark couple, Pt/C//IrO2, 2.038 V with 55% decay in 24 hr. A new catalytic phenomenon is discovered, two different catalytic mechanisms functioning simultaneously on different constituents of H-FeCoNiCuMo, the Volmer-Heyrovsky route on Co and Cu and Volmer-Tafel route on Ni and Mo, from which a new kinetic model is formulated to predict a new theoretical lower limit of Tafel slope of 15 mV dec−1 for hydrogen evolution reactions. |
| 關聯: | Applied Catalysis B: Environmental 320, 122016 |
| DOI: | 10.1016/j.apcatb.2022.122016 |
| 顯示於類別: | [化學工程與材料工程學系暨研究所] 期刊論文
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