https://scholars.lib.ntu.edu.tw/handle/123456789/626255
標題: | Dynamic Co(µ-O)2Ru Moiety Endowed Efficiently Catalytic Hydrogen Evolution | 作者: | Tung C.-W Kuo T.-R Huang Y.-P Chu Y.-C Hou C.-H Li Y Suen N.-T Han J HAO MING CHEN |
關鍵字: | hydrogen evolution reaction; in situ XAS; Ru | 公開日期: | 2022 | 來源出版物: | Advanced Energy Materials | 摘要: | A large number of highly active Ru-based electrocatalysts have been reported for the hydrogen evolution reaction (HER). The utilization of synergistic effects for promoting HER performance remains inadequate, especially for corresponding potential-driven reactive sites at the atomic level. Herein, a Co-substituted Ru Ru2P structure is employed as a model system to reveal the synergistic effect on Ru-based electrocatalysts and to realize the potential-driven reactive sites during the HER. Optimized Ru Ru2P @ Co0.6 exhibits a superior catalytic performance in alkaline electrolytes, achieving a low overpotential of 9 mV at a current density of 10 mA cm–2. To precisely describe the geometrical nature of surface moiety of Co(µ-O)2Ru, an indicator (β) is established to quantify the strain of Co(µ-O)2Ru moieties through calculating the L Co L (L = P or O) angles through employing in situ X-ray absorption spectroscopy. Both bond strain and corresponding metal-metal distance of Co Ru in Co(µ-O)2Ru moiety can significantly affect the structural tolerance and facilitate the coupling of adsorbed hydrogen atoms during HER. It is believed that the perspective raised in the present work will provide a new avenue to the design of highly active HER catalysts at the atomic scale. © 2022 Wiley-VCH GmbH. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131742823&doi=10.1002%2faenm.202200079&partnerID=40&md5=654771ff7015cb83092b9bc24d3331d9 https://scholars.lib.ntu.edu.tw/handle/123456789/626255 |
ISSN: | 16146832 | DOI: | 10.1002/aenm.202200079 | SDG/關鍵字: | Cobalt; Electrocatalysts; Hydrogen; Ruthenium; Ruthenium compounds; X ray absorption spectroscopy; Atomic levels; Catalytic hydrogen evolution; Catalytic performance; Hydrogen evolution reactions; In-situ XAS; Modelling systems; Reaction performance; Reactive site; Ru; Synergistic effect; Atoms |
顯示於: | 化學系 |
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