Highly dispersed ternary metal FeZnCe with nitrogen/oxygen co-doped carbon materials for efficient oxygen electroreduction

被引:7
作者
Zheng, Fuxian [1 ]
Guo, Yajie [1 ]
Wang, Ting [1 ]
Meng, Xianghui [1 ]
Qu, Konggang [1 ]
Wang, Lei [1 ]
Li, Rui [1 ]
Li, Zongge [1 ]
Kang, Wenjun [1 ]
Li, Haibo [1 ]
机构
[1] Liaocheng Univ, Sch Chem & Chem Engn, Shandong Prov Key Lab Chem Energy Storage & Novel, Liaocheng 252059, Peoples R China
基金
中国国家自然科学基金;
关键词
Electrocatalysis; Oxygen reduction reaction; Carbon materials; Atomic dispersion; Zinc-air batteries; REDUCTION; SITES; PERFORMANCE; DESIGN;
D O I
10.1016/j.cej.2024.155487
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The synthesis of atomically dispersed multi-metals in hetero-element-doped carbon materials is crucial for improving the performance of the electrocatalytic oxygen reduction reaction (ORR), but represents a significant challenge. Herein, an unusual FeZnCe trimetallic atom site is elaborately developed with the nitrogen-coordinated Fe and Zn atoms and the oxygen-coordinated Ce nanoclusters (FeN4/ZnN4/Ce-O-Ce) anchored in nitrogen/oxygen-doped carbon via a simple wet chemistry strategy based on a liquid-phase organic small molecule formamide and a post-coordination process. Meanwhile, with the promotion of Ce, more active sites of Fe atoms can be effectively activated (site density of 24.9 mu mol g(-1) and turnover of frequency of 1.05s(-1)). Electrochemical measurements showed that the ternary FeZnCe5-NC achieved an excellent ORR performance in alkaline with an initial potential of 1.04 V and a half-wave potential of 0.88 V. Furthermore, the FeZnCe5-NC-based Zn-air battery exhibits high peak power density (172.4 mW cm(-2)) and specific capacity (819.2 mAhg(Zn)(-)(1)), along with high-rate capability and good long-term stability.
引用
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页数:10
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