双金属片
催化作用
电解质
氧还原
金属
化学
氧气
钴
吸附
无机化学
组合化学
化学工程
电极
电化学
物理化学
有机化学
工程类
作者
Feng Liu,Lei Shi,Xuanni Lin,Bao Zhang,Yongde Long,Fenghui Ye,Riqing Yan,Ruyi Cheng,Chuangang Hu,Dong Liu,Jieshan Qiu,Liming Dai
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2023-06-09
卷期号:9 (23)
被引量:7
标识
DOI:10.1126/sciadv.adg0366
摘要
Here, we report a conceptual strategy for introducing spatial sulfur (S)–bridge ligands to regulate the coordination environment of Fe-Co-N dual-metal centers (Spa-S-Fe,Co/NC). Benefiting from the electronic modulation, Spa-S-Fe,Co/NC catalyst showed remarkably enhanced oxygen reduction reaction (ORR) performance with a half-wave potential ( E 1/2 ) of 0.846 V and satisfactory long-term durability in acidic electrolyte. Combined experimental and theoretical studies revealed that the excellent acidic ORR activity with a remarkable stability observed for Spa-S-Fe,Co/NC is attributable to the optimal adsorption-desorption of ORR oxygenated intermediates achieved through charge-modulation of Fe-Co-N bimetallic centers by the spatial S-bridge ligands. These findings provide a unique perspective to regulate the local coordination environment of catalysts with dual-metal-centers to optimize their electrocatalytic performance.
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