期刊
JOURNAL OF POWER SOURCES
卷 545, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2022.231913
关键词
Hierarchically porous carbon; Dual-templating method; Single-atom catalyst; Oxygen reduction reaction; Electrocatalysis
资金
- Beijing Natural Science Foundation [2222004]
A facile strategy to fabricate hierarchical porous carbon nanospheres with isolated single-atom iron sites was presented, showing excellent electrocatalytic performance towards oxygen reduction reaction. The catalyst exhibited superior performance compared to commercial Pt/C catalysts and showed promising potential for applications in metal-air batteries and fuel cells for sustainable energy conversion and storage.
Design of a highly efficient nonprecious metal electrocatalysts towards oxygen reduction reaction (ORR) is essential for the commercialization of sustainable and economical energy conversion and storage devices containing metal-air batteries and fuel cells. Herein, we present a facile strategy to fabricate the hierarchical porous carbon nanospheres with isolated single-atom iron sites by using the dual-template method of combination of triblock polymers F127 and silica as soft and hard templates, respectively. Owing to the simultaneous hydrolysis of tetraethoxysilane (TEOS) and polymerization of 2,6-diaminopyridine (DAP), the Fe-Nx active sites are protected and the micro-mesoporous structures are constructed. Benefiting from the synergistic effects of the high loaded contents of Fe-Nx active sites and the hierarchically porous nanostructure, Fe-N/C-SA exhibits the excellent electrocatalytic performance over ORR with E-1/2 of 0.89 V, which is superior than that of Pt/C (0.84 V). In addition, the as-obtained catalyst exhibits excellent stability and methanol tolerance compared to commercial Pt/C catalysts. Most importantly, the Zn-air battery assembled with Fe-N/C-SA exhibits a gratifying peak power density of 265.0 mW cm(-2), large specific capacity of 798.2 mAh g(-1), excellent long-term stability and remarkable rate capability.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据