Unveiling the Enhancement of Electrocatalytic Oxygen Evolution Activity in Ru-Fe2O3/CoS Heterojunction Catalysts

被引:5
作者
Chen, Xue [1 ,2 ]
Kong, Yilin [1 ]
Yin, Hongfei [1 ]
Yang, Xiaoyong [1 ,3 ]
Zhao, Qiuyu [1 ]
Xiao, Dongdong [4 ]
Wang, Zhili [2 ]
Zhang, Yongzheng [1 ,5 ]
Xue, Qikun [5 ,6 ]
机构
[1] Qufu Normal Univ, Sch Phys & Phys Engn, Qufu 273165, Peoples R China
[2] Jilin Univ, Sch Mat Sci & Engn, Changchun 130022, Peoples R China
[3] Uppsala Univ, Dept Phys & Astron, Mat Theory Div, Condensed Matter Theory Grp, Box 516, S-75120 Uppsala, Sweden
[4] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
[5] Tohoku Univ, Adv Inst Mat Res, Sendai 9808577, Japan
[6] Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
基金
中国国家自然科学基金;
关键词
doping; electrocatalytic oxygen evolution reaction; heterostructure; ring morphology; ELECTRONIC-STRUCTURE; FE;
D O I
10.1002/smll.202403427
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The development of highly efficient electrocatalysts for the sluggish anodic oxygen evolution reaction (OER) is crucial to meet the practical demand for water splitting. In this study, an effective approach is proposed that simultaneously enhances interfacial interaction and catalytic activity by modifying Fe2O3/CoS heterojunction using Ru doping strategy to construct an efficient electrocatalytic oxygen evolution catalyst. The unique morphology of Ru doped Fe2O3 (Ru-Fe2O3) nanoring decorated by CoS nanoparticles ensures a large active surface area and a high number of active sites. The designed Ru-Fe2O3/CoS catalyst achieves a low OER overpotential (264 mV) at 10 mA cm(-2) and demonstrates exceptional stability even at high current density of 100 mA cm(-2), maintaining its performance for an impressive duration of 90 h. The catalytic performance of this Ru-Fe2O3/CoS catalyst surpasses that of other iron-based oxide catalysts and even outperforms the state-of-the-art RuO2. Density functional theory (DFT) calculation as well as experimental in situ characterization confirm that the introduction of Ru atoms can enhance the interfacial electron interaction, accelerating the electron transfer, and serve as highly active sites reducing the energy barrier for rate determination step. This work provides an efficient strategy to reveal the enhancement of electrocatalytic oxygen evolution activity of heterojunction catalysts by doping engineering.
引用
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页数:9
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